onward vs shiftable

onward

adj
  • Advanced in a forward direction or toward an end. 

  • Moving forward. 

adv
  • In a forward direction. 

verb
  • To keep going; to progress or persevere. 

shiftable

adj
  • That can be shifted 

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