contiguous vs touching

contiguous

adj
  • Connected; touching; abutting. 

  • Adjacent; neighboring. 

  • Connecting without a break. 

touching

prep
  • Regarding; concerning. 

adj
  • Provoking sadness and pity; that can cause sadness or heartbreak among witnesses to a sad event or situation. 

noun
  • The act by which something is touched. 

  • A snack served with alcoholic drinks in an informal environment. 

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