Here are some ways to express the concept of "easiness" as a noun:
* Ease: This is the most common and direct noun form, meaning "freedom from difficulty or effort."
* Simplicity: This implies a lack of complexity or intricacy.
* Facility: This emphasizes the ability to do something easily.
You might also use phrases like:
* A state of ease
* The ease of the task
* The simplicity of the instructions
The best choice will depend on the context and the specific meaning you want to convey.