be at mercy of vs pend

be at mercy of

pend

verb
  • To consider pending; to delay or postpone (something). 

noun
  • An archway; especially, a vaulted passageway leading through a tenement-style building from the main street, giving access to the rear of the building or an internal courtyard. 

  • oil cake 

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