construct vs play by ear

construct

verb
  • To build (a sentence, an argument, etc.) by arranging words or ideas. 

  • To draw (a geometric figure) by following precise specifications and using geometric tools and techniques. 

  • To build or form (something) by assembling parts. 

noun
  • A concept or model. 

  • Something constructed from parts. 

  • A segment of nucleic acid, created artificially, for transplantation into a target cell or tissue. 

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. 

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