mind-numbing vs unvaried

mind-numbing

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

unvaried

adj
  • not varied; monotonous or homogeneous; samely 

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