clef vs comp

clef

noun
  • A symbol found on a musical staff that indicates the pitches represented by the lines and the spaces on the staff 

comp

verb
  • To provide (someone) with a complimentary item, such as a ticket. 

  • To compose (a visual design); to make a composite. 

  • To provide a complimentary item, such as a ticket. 

  • To accompany, in music. 

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