aforehand vs sometime

aforehand

adv
  • Beforehand; in advance; in anticipation. 

adj
  • Beforehand in condition; forehanded. 

sometime

adv
  • At an indefinite but stated time in the past or future. 

adj
  • Occasional. 

  • Former, erstwhile; at some previous time. 

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