halfway vs partwise

halfway

adv

  • Moderately; somewhat. 

  • Half of the way between two points; midway. 

partwise

adv

  • Partly. 

  • With respect to each part of something. 

adj

  • True with respect to each part of something. 

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