Is the noun employment a countable or non noun?

"Employment" can be both countable and uncountable, depending on the context:

Uncountable:

* When referring to the general state of having a job: "There is a lot of employment in the tech industry."

* When discussing employment as a concept: "Employment rates have been steadily increasing."

Countable:

* When referring to specific jobs or positions: "He has had several employments in his career."

* When discussing different types of employment: "There are many different types of employments available."

Here's a simple way to think about it:

* Uncountable: Focuses on the general idea of having a job

* Countable: Focuses on individual jobs or specific types of employment

The best way to determine whether it's countable or uncountable is to look at the context of the sentence.