What is the collective noun for cache?

There isn't a widely recognized collective noun specifically for caches.

Here are a few options, depending on the context:

General:

* A collection of caches

* A set of caches

* A group of caches

More specific:

* A cache of data (if referring to data storage)

* A cache of weapons (if referring to hidden weapons)

* A hoard of caches (if referring to a large collection)

Ultimately, the best term to use depends on the specific context and the type of cache you are referring to.