-esque vs -or

-esque

suffix
  • In the style or manner of; appended to nouns, especially proper nouns, and forming adjectives. 

  • Resembling; appended to nouns, especially proper nouns, and forming adjectives. 

-or

suffix
  • Used to form nouns of quality, state, or condition. 

  • Appended to the names of members of classes of components, especially those that have an extensive property name of the same root suffixed with -ance 

  • Creates an agent noun, often from a verb, indicating a person or object (often machines or parts of them) that do the verb or part of speech with which they are formed. 

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