ah vs hrm

ah

intj
  • An expression of relief, relaxation, comfort, confusion, understanding, wonder, awe, etc. according to uttered inflection. 

  • A syllable used to fill space, particularly in music. 

verb
  • To give a cry of "ah". 

noun
  • An instance of the interjection ah. 

particle
  • Marks a tag question prompting the listener to clarify something. 

  • A filler word used to ascertain the continued attention of the listener. 

  • Used for emphasis; sometimes placed at the end of a short wh-question. 

  • Emphasizes the need for the listener's absolute acknowledgment or consent. 

hrm

intj
  • Expresses a moment of particular curiosity or thoughtfulness. 

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