confabulation vs head-to-head

confabulation

noun

  • A casual conversation; a chat. 

  • A fabricated memory believed to be true. 

head-to-head

adj

  • Direct, one-to-one. 

adv

  • Directly, one-to-one. 

  • Facing one another. 

How often have the words confabulation and head-to-head occurred in a corpus of books? (source: Google Ngram Viewer )