galling vs pestering

galling

noun
  • Material transfer caused by adhesion between sliding surfaces, potentially resulting in wear or binding. 

adj
  • Vexing, humiliating; eliciting indignation or bitterness. 

pestering

noun
  • An act or instance of annoying somebody. 

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