mind-numbing vs prosaic

mind-numbing

adj
  • Excessively boring, tedious, or dull; repetitive; of an activity, etc., lacking any interest or variety that might serve as intellectual stimulation. 

prosaic

adj
  • Overly plain, simple or commonplace, to the point of being boring. 

  • Straightforward; matter-of-fact; lacking the feeling or elegance of poetry. 

  • Pertaining to or having the characteristics of prose. 

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