That is because you aren’t supposed to fit every check to a skill. The default is actually most using raw ability scores, like how most adventures (but not all) use simple Strength checks to break down doors, rather than Athletics. Its definition is actually rather narrow, sticking to sporting type activities, but people mistakenly try to fit as many Strength based actions into it for the bonus. So it is fine if you just did a raw Intelligence check rather than trying to torture the definitions to fit every check. For example, if a character wants to make a roll to see if they remember an obscure detail from a past session (assuming you just don’t give it to them), there is no skill for how sharp their recollections are — just doing a raw Intelligence check there would make sense.
For this specific example though… the description of History speaks of knowledge of legendary people (guild founders), past disputes, and historical events, so it seems pretty clear cut History to me.