citerior vs ulterior

citerior

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

ulterior

adj
  • Situated beyond, or on the farther side. 

  • Being intentionally concealed so as to deceive. 

  • Beyond what is obvious or evident. 

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