Rating
late Middle English (expressing a notion of ‘estimated value’): from Old French, from medieval Latin rata (from Latin pro rata parte (or portione ) ‘according to the proportional share’), from ratus ‘reckoned’, past participle of reri .
wiktionary
etymonline
rating (n.1)
1530s, "a fixing of rates, proportionate distribution of charge or compensation," verbal noun from rate (v.2). Meaning "a classification according to grade or rank" is from 1764.
Ratings "statistical estimate of the size of an audience for a particular broadcast," originally radio programs, began in 1930 in U.S. under a system set up by pollster and market researcher Archibald M. Crossley (1896-1985), and were called Crossley ratings or Crossleys until ratings began to be preferred c. 1947.
rating (n.2)
"a reproving," 1570s, verbal noun from rate (v.1).
