citerior vs impending

citerior

adj
  • Chiefly in place names: situated on the nearer side. 

impending

adj
  • Approaching; drawing near; about to happen or expected to happen. 

noun
  • Something that impends or threatens; an expected event. 

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