grump vs mutterer

grump

noun

  • A habitually grumpy or complaining person. 

  • A grumpy mood. 

verb

  • To complain. 

  • To be grumpy. 

mutterer

noun

  • One who mutters. 

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