afore vs erstwhiles

afore

conj
  • In advance of the time when; before. 

prep
  • Before; situated geographically or metaphorically in front of. 

  • Before; in advance of the time of. 

adv
  • In the fore part of a ship. 

erstwhiles

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