bill and coo vs solicit

bill and coo

verb
  • To exchange loving and affectionate behaviour, such as caresses and kisses. 

  • To coo and rub beaks as a prelude to mating. 

solicit

verb
  • To offer to perform sexual activity, especially when for a payment. 

  • To urge the claims of; to plead; to act as solicitor for or with reference to. 

  • To persuade or incite one to commit some act, especially illegal or sexual behavior. 

  • To woo; to court. 

  • To persistently endeavor to obtain an object, or bring about an event. 

  • If you want to lose your virginity, you should try to solicit some fine looking women. 

  • To make a petition. 

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