chat vs communicate

chat

verb
  • To talk of; to discuss. 

  • To talk more than a few words. 

  • 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. 

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. 

communicate

verb
  • To express or convey ideas, either through verbal or nonverbal means; to have intercourse, to exchange information. 

  • To impart or transmit (information or knowledge) to someone; to make known, to tell. 

  • To pass on (a disease) to another person, animal etc. 

  • To receive the bread and wine at a celebration of the Eucharist; to take part in Holy Communion. 

  • To administer the Holy Communion to (someone). 

  • To be connected with (another room, vessel etc.) by means of an opening or channel. 

  • To impart or transmit (an intangible quantity, substance); to give a share of. 

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