guzzle vs pick at

guzzle

verb
  • To drink or eat quickly, voraciously, or to excess; to gulp down; to swallow greedily, continually, or with gusto. 

  • To consume anything quickly, greedily, or to excess, as if with insatiable thirst. 

noun
  • The throat. 

pick at

verb
  • To pick on or repeatedly criticize (someone). 

  • To touch, grab, handle, or pull tentatively or gingerly, using a utensil or one's fingers. 

How often have the words guzzle and pick at occurred in a corpus of books? (source: Google Ngram Viewer )