chummy vs contactual

chummy

adj
  • Friendly; on, or trying to be on, intimate terms. 

noun
  • Synonym of chum (“friend, pal”) 

  • Nickname for a person, especially a suspect or criminal. 

contactual

adj
  • Of or relating to contact. 

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