converge vs intermingle

converge

verb
  • (said of two or more entities) To approach each other; to get closer and closer. 

  • (said of a sequence or series) To have a (finite, proper) limit. 

  • (said of an iterative process) To reach a stable end point. 

intermingle

verb
  • To mix or become mixed together. 

How often have the words converge and intermingle occurred in a corpus of books? (source: Google Ngram Viewer )