chat vs mentum

chat

noun
  • A louse (small, parasitic insect). 

  • Any of various small Old World passerine birds in the muscicapid tribe Saxicolini or subfamily Saxicolinae that feed on insects. 

  • A chat room. 

  • An exchange of text or voice messages in real time through a computer network, resembling a face-to-face conversation. 

  • A small potato, such as is given to swine. 

  • Mining waste from lead and zinc mines. 

  • Informal conversation. 

  • The entirety of users in a chat room or a single member thereof. 

  • Any of several small Australian honeyeaters in the genus Epthianura. 

  • A conversation to stop an argument or settle a situation. 

verb
  • To talk more than a few words. 

  • To talk of; to discuss. 

  • To be engaged in informal conversation. 

  • To exchange text or voice messages in real time through a computer network, as if having a face-to-face conversation. 

mentum

noun
  • The central part of the labium in insects. 

  • A chin-like projection below the mouth of certain mollusks. 

  • A projection in front of the flower in some orchids. 

  • The chin. 

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