play by ear vs trump up

play by ear

verb
  • To do by guessing, intuition, or trial and error; to react to events as they occur; improvise 

  • To play guided by one's musical ear, rather than from a written score. 

trump up

verb
  • To create falsely, to fabricate (particularly applied to accusations, (legal) charges or evidence). 

  • Heavily publicise, promote or market a product. 

How often have the words play by ear and trump up occurred in a corpus of books? (source: Google Ngram Viewer )