pick at vs please

pick at

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

  • To pick on or repeatedly criticize (someone). 

please

verb
  • To desire; to will; to be pleased by. 

  • To make happy or satisfy; to give pleasure to. 

adv
  • An expression of annoyance or impatience. 

  • Said as a request to repeat information. 

  • Used to make a polite request. 

  • Used as an affirmative to an offer. 

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