estimate vs evaluate

estimate

verb
  • To judge and form an opinion of the value of, from imperfect data. 

  • To calculate roughly, often from imperfect data. 

noun
  • A rough calculation or assessment of the value, size, or cost of something. 

  • A document (or verbal notification) specifying how much a job is likely to cost. 

  • An upper limitation on some positive quantity. 

evaluate

verb
  • To draw conclusions from examining; to assess. 

  • To compute or determine the value of (an expression). 

  • To return or have a specific value. 

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