What's the plural form of geohistory? Here's the word you're looking for.
Answer
The noun geohistory can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be geohistory.
However, in more specific contexts, the plural form can also be geohistories e.g. in reference to various types of geohistories
or a collection of geohistories.