musician vs songbird

musician

noun
  • A composer, conductor, or a performer of music; more specifically, it's a person who sings and/or plays a musical instrument as a hobby, an occupation, or a profession. 

songbird

noun
  • Any bird in the passerine suborder Passeri, which are distinguished by a more sophisticated vocal apparatus 

  • A bird having a melodious song or call. 

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