contiguous vs imperfective

contiguous

adj
  • Connected; touching; abutting. 

  • Adjacent; neighboring. 

  • Connecting without a break. 

imperfective

adj
  • Of, relating to or having the properties of the imperfective aspect. 

noun
  • The imperfective aspect; a verb having this aspect. 

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