Create a line chart with chart.js and powershell

Hey everybody,
i need help to create a line Chart with PowerShell. I have a pscostumobject:

foreach ($item in $objectcollection['getEmailAppUsageUserCounts']) {
    $objR6 = [PSCustomObject]@{
        'Name'  = 'Mail for Mac';
        'Count' = $item.'Mail for Mac';
        'Date'  = $item.'Report Date'
    }
    $EmailAppUsageUserCountstable.add($objR6)
    $objR6 = [PSCustomObject]@{
        'Name'  = 'Outlook for Mac'
        'Count' = $item.'Outlook for Mac'
        'Date'  = $item.'Report Date'
    }
    $EmailAppUsageUserCountstable.add($objR6)
    $objR6 = [PSCustomObject]@{
        'Name'  = 'Outlook for Windows'
        'Count' = $item.'Outlook for Windows'
        'Date'  = $item.'Report Date'
    }
    $EmailAppUsageUserCountstable.add($objR6)
    $objR6 = [PSCustomObject]@{
        'Name'  = 'Outlook for Mobile'
        'Count' = $item.'Outlook for Mobile'
        'Date'  = $item.'Report Date'
    }
    $EmailAppUsageUserCountstable.add($objR6)
    $objR6 = [PSCustomObject]@{
        'Name'  = 'Other for Mobile'
        'Count' = $item.'Other for Mobile'
        'Date'  = $item.'Report Date'
    }
    $EmailAppUsageUserCountstable.add($objR6)
    $objR6 = [PSCustomObject]@{
        'Name'  = 'Outlook for Web'
        'Count' = $item.'Outlook for Web'
        'Date'  = $item.'Report Date'
    }
    $EmailAppUsageUserCountstable.add($objR6)
    $objR6 = [PSCustomObject]@{
        'Name'  = 'POP3 App'
        'Count' = $item.'POP3 App'
        'Date'  = $item.'Report Date'
    }
    $EmailAppUsageUserCountstable.add($objR6)
    $objR6 = [PSCustomObject]@{
        'Name'  = 'IMAP4 App'
        'Count' = $item.'IMAP4 App'
        'Date'  = $item.'Report Date'
    }
    $EmailAppUsageUserCountstable.add($objR6)
    $objR6 = [PSCustomObject]@{
        'Name'  = 'SMTP App'
        'Count' = $item.'SMTP App'
        'Date'  = $item.'Report Date'
    }
    $EmailAppUsageUserCountstable.add($objR6)
}

The $objectcollection i created with the following Code:

$objectcollection = @{ }
foreach ($report in $O365Reports) {
    $UsageData = Get-UsageReportData -ClientID $ClientID -ClientSecret $ClientSecret -TenantName $TenantName
    if ($UsageData) {
        $UsageData | add-member -membertype NoteProperty -name 'Office365Report' -Value $Report
        $objectCollection.Add($($Report), $UsageData)
    }
    else {
        $objResults = New-Object -Type PSObject
        $objResults | add-member -membertype NoteProperty -name 'Office365Report' -Value $Report
        $objectCollection.Add($($Report), $objResults)
    }
}

Now i will create a line Chart from the results. The result is:

Name Count Date


Mail for Mac 2019-06-02
Outlook for Mac 2019-06-02
Outlook for Windows 6 2019-06-02
Outlook for Mobile 1 2019-06-02
Other for Mobile 11 2019-06-02
Outlook for Web 2019-06-02
POP3 App 2019-06-02
IMAP4 App 2019-06-02
SMTP App 2019-06-02
Mail for Mac 2019-06-03
Outlook for Mac 2019-06-03
Outlook for Windows 39 2019-06-03
Outlook for Mobile 1 2019-06-03
Other for Mobile 17 2019-06-03
Outlook for Web 2019-06-03
POP3 App 2019-06-03
IMAP4 App 2019-06-03
SMTP App 1 2019-06-03
Mail for Mac 2019-06-04
Outlook for Mac 2019-06-04
Outlook for Windows 40 2019-06-04
Outlook for Mobile 1 2019-06-04
Other for Mobile 17 2019-06-04
Outlook for Web 2019-06-04
POP3 App 2019-06-04
IMAP4 App 2019-06-04
SMTP App 1 2019-06-04
Mail for Mac 2019-06-05
Outlook for Mac 2019-06-05
Outlook for Windows 43 2019-06-05
Outlook for Mobile 1 2019-06-05
Other for Mobile 16 2019-06-05
Outlook for Web 1 2019-06-05

The Problem is now that i have multiple names with multiple Counts on different days. I would like to convertb now the result to following Schema:

Mail for Mac

2019-06-02 6
2019-06-03 10
and so on
The same for the other names.

Manually is the chart working but not in the script.
Have anyone an idea?

You would use Group-Object cmdlet. You can use -Property Name, hence it will get grouped using the name property.

Get-Help Group-Object -Online