just about vs somewhat

just about

adv
  • Approximately, very nearly. 

somewhat

adv
  • Very. 

  • To a limited extent or degree. 

noun
  • More or less; a certain quantity or degree; a part, more or less; something. 

  • A person or thing of importance; a somebody. 

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