clearness vs precision

clearness

noun
  • Mental or sensory distinctness; clarity of understanding, perception etc. 

  • The state of being free from obstruction or interference. 

  • The state of being free from obscurities or opacity; distinctness of light, colour etc. 

precision

noun
  • The state of being precise or exact; exactness. 

  • The number of significant digits to which a value may be measured reliably. 

  • The ability of a measurement to be reproduced consistently. 

  • A bidding system that makes use of many artificial bids to describe a hand quite precisely. 

adj
  • Made, or characterized by accuracy. 

  • Used for exact or precise measurement. 

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