avouch vs disclaim

avouch

verb
  • To acknowledge deliberately; to admit; to confess; to sanction. 

  • To declare freely and openly; to assert. 

  • To confirm or verify, to affirm the validity of. 

  • To appeal to; to cite or claim as authority. 

disclaim

verb
  • To deny, as a claim; to refuse. 

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

  • To make an admission or warning. 

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

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