Thanks for the comment. There have been a lot of studies done using the general TF-IDF approach. You can read about it on https://en.wikipedia.org/wiki/Tf%E2%80

Thanks for the comment. There have been a lot of studies done using the general TF-IDF approach. You can read about it on https://en.wikipedia.org/wiki/Tf%E2%80%93idf https://en.wikipedia.org/wiki/Tf%E2%80%93idf There is also a new version planned using a different approach.