knock back vs sup

knock back

verb
  • To drink an alcoholic beverage swiftly or often. 

  • To stun; to surprise. 

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

  • To reject; to refuse. 

sup

verb
  • To sip; to take a small amount of food or drink into the mouth, especially with a spoon. 

  • To take supper. 

adj
  • Being or relating to the squark that is the superpartner of an up quark. 

intj
  • what's up (either as a greeting or actual question) 

noun
  • Supplement. 

  • Supremum, upper limit. 

  • A sip; a small amount of food or drink. 

  • Superintendent. 

  • A supervision. 

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