crabwise vs sidewards

crabwise

adj

  • In the manner of a crab; sideways. 

  • Incidental. 

adv

  • In the manner of a crab; sideways. 

sidewards

adj

  • Toward a side. 

adv

  • Toward a side. 

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