Comment by JanecekPetr

That's kind of the idea of Caffeine, it has admission buffers, and it adapts automatically between LRU and LFU. The original algorithm is called Windiw TinyLFU (design https://github.com/ben-manes/caffeine/wiki/Design), see it in action e.g. here: https://github.com/ben-manes/caffeine/wiki/Efficiency