tho' vs whilst

tho'

conj
  • though 

adv
  • though 

whilst

conj
  • Besides; in addition. 

  • Although; in contrast; whereas. 

  • Only if; provided that; as long as. 

  • During the whole, or until the end, of the time that; as long as, at the same time. 

  • Within, or before the end, of the time that. 

adv
  • Often preceded by the: During the time; meanwhile. 

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