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