disclaim vs petition

disclaim

verb
  • To renounce all claim to; to deny ownership of or responsibility for; to disown; to disavow; to reject. 

  • To make an admission or warning. 

  • To deny, as a claim; to refuse. 

  • (law) To relinquish or deny having a claim; to disavow another's claim; to decline accepting, as an estate, interest, or office. 

petition

noun
  • A compilation of signatures built in order to exert moral authority in support of a specific cause. 

  • A formal written request for judicial action. 

  • A prayer; a supplication; an entreaty. 

  • A formal, written request made to an official person or organized body, often containing many signatures. 

verb
  • To make a request to, commonly in written form. 

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