at no cost vs comp

at no cost

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 at no cost and comp occurred in a corpus of books? (source: Google Ngram Viewer )