contiguous vs incoherent

contiguous

adj
  • Connected; touching; abutting. 

  • Adjacent; neighboring. 

  • Connecting without a break. 

incoherent

adj
  • Not cohering socially, not united. 

  • Not making logical sense; not logically connected or consistent. 

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