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