Is there a way to sort the apps by usage frequncy? I want to know if there's a quick way to find out the number of times one opens each app so that we can know which apps are really used by us frequently and we can sort them in that order.

I've tried to Google it but couldn't find any information that is really useful. Is it possible to do so?
I haven't seen any Spotlight metadata that counts the number an app is launched, you can, however, use the Date Last opened as a reference.

Open your /Applications folder and right click on the sort bar (where it says name, date modified, Size, etc.) and select Date Last Opened. Click on that to sort by that column and that's as close as you can get.



If you're feeling fancy, you can create a smart folder that only shows the apps that you've opened in the last  number of days, weeks, etc. :)