refusal vs solicitation

refusal

noun
  • The act of refusing. 

  • Depth or point at which well or borehole drilling cannot continue. 

solicitation

noun
  • the action or instance of soliciting; petition; proposal 

  • an inchoate offense that consists of a person offering money or inducing another to commit a crime with the specific intent that the person solicited commit the crime 

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