knock back vs overpass

knock back

verb
  • To reject; to refuse. 

  • To drink an alcoholic beverage swiftly or often. 

  • To stun; to surprise. 

  • To press or knead (dough) so as to remove air bubbles. 

overpass

verb
  • To disregard, skip, or miss something. 

  • To pass above something, as when flying or moving on a higher road. 

  • To exceed, overstep, or transcend a limit, threshold, or goal. 

noun
  • A section of a road or path that crosses over an obstacle, especially another road, railway, etc. 

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