frecency
Any heuristic that combines the frequency and recency into a single measure, typically used to predict page revisits in a web browser.
countable, rare, uncountable
For example, a feature called "frecency" compiles the user's browing^([sic]) history to suggest similar websites and searches.
Where it comes from
Blend of frequency + recency, coined for the development of Mozilla Firefox.
Adapted from the Wiktionary entry frecency (CC BY-SA 4.0).