rightward vs substantially

rightward

adv
  • To or from the right. 

adj
  • To or from the right. 

substantially

adv
  • To a great extent; in essence; essentially. 

  • Without material qualifications. 

  • In a strong substantial manner; considerably. 

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