turnover rate is a noun meaning "the ratio of the number of workers that had to be replaced in a given time period to the average number of workers". It carries one recorded sense.
the ratio of the number of workers that had to be replaced in a given time period to the average number of workers
Definitions, synonyms and semantic relations for turnover rate come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.