a mixed bag of vs divergent

a mixed bag of

divergent

adj
  • Causing divergence of rays. 

  • Disagreeing from something given; differing. 

  • (said of a sequence or series) Diverging; not approaching a limit. 

  • Growing further apart; diverging. 

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