I was looking for a noun to describe a temporary state for something, and unsurprisingly found **"temporariness"** in Merriam-Webster, [defined as](https://www.merriam-webster.com/thesaurus/temporariness):

> 
> the state or quality of lasting only for a short time.
> 
> 
> 

**Example:**

*The temporariness of the job is probably the reason why so few people are applying for it.*

I understand the above meaning of "temporariness" and its usage, but somehow it doesn't seem idiomatic to me. Maybe because I haven't seen it used anywhere, either colloquial or academic/formal.

And the synonyms listed by M-W don't help that much:

```
ephemerality, evanescence, fleetingness, fugitiveness, impermanence, impermanency, 
momentariness, transience, transiency, transitoriness

```

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**My intended usage:**

I quoted a definition in my text that went like "*That concept is considered as a basis for a time to provide [...].*"

Now, as a reference to the above definition, I wanted to say "**The [temporariness?] of the the concept** is an important aspect, which we often overlook in its definition"

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So, is there a more idomatic alternative to this word?