anon vs hereat

anon

adv

  • At another time; then; again. 

  • Soon; in a little while. 

adj

  • anonymous 

noun

  • An anonymous person, especially an author. 

  • A work with an unknown author. 

  • A work without a title. 

hereat

adv

  • At this time; upon this event. 

  • At this; because of this. 

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