There is a value report in the report section that gives information of software deployed. Nothing as specific as what your asking. Good idea.
As Ty indicated nothing that specific. However, if you think about it you can run a query for all tasks distributed during a given time period:
Also wondering if you monitor"C:\Program Files\LANDesk\LDClient\policy.client.portal.exe" will show you how often the portal is launched but won't show if anything is installed or
You can experiment with tracking sdclient.exe and use times run to see how many times sdclient kicks off assuming that each time sdclient fires off something is being installed.