In English, we can take a verb like "swim" and refer to it as a noun in reference to occurrences. For example,
- "That was a good swim,"
- "I have three swims next week."
Is there a similar construct for Latin? The infinitive and the gerund come to mine. But in the first example, "swim" is nominative, so it doesn't fit the usual gerund pattern. "Natare bonum erat" implies "swimming was good" rather than referring to a particular instance of a swim that was good.
In the second example, "swim" is accusative. But references I found about the accusative gerunds indicate this was more commonly used for purpose than to refer to instances of occurrence.