contiguous vs wireless

contiguous

adj
  • Connected; touching; abutting. 

  • Adjacent; neighboring. 

  • Connecting without a break. 

wireless

noun
  • Wireless connectivity to a computer network. 

  • The medium of radio communication. 

verb
  • To send a message by wireless (by radio) 

adj
  • Not having any wires. 

  • Of or relating to communication without a wired connection, such as by radio waves. 

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