contiguous vs desultory

contiguous

adj
  • Connected; touching; abutting. 

  • Adjacent; neighboring. 

  • Connecting without a break. 

desultory

adj
  • Jumping, or passing, from one thing or subject to another, without order, planning, or rational connection; lacking logical sequence. 

  • Disappointing in performance or progress. 

  • Out of course; by the way; not connected with the subject. 

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