There's Stack Exchange site for this type of question. It is too localized, specifically it only applies to a specific moment in time. It's also dependent on industry and geographic location as to what technologies are used. There's also no objective criteria for "often".

I think there might already be questions about how to determine what technologies and languages are popular in given areas, and the answers to those questions point to different resources that you can use. I'd search around for those as a starting point.

There's no Stack Exchange site for this type of question. It is too localized, specifically it only applies to a specific moment in time. It's also dependent on industry and geographic location as to what technologies are used. There's also no objective criteria for "often".

I think there might already be questions about how to determine what technologies and languages are popular in given areas, and the answers to those questions point to different resources that you can use. I'd search around for those as a starting point.