Word count is On-Page SEO factor that depends on goal of the content.
It’s not really about long or short – it should be according to the length of the post to the topic and the audience.
For example , if you’re creating a blog post that defines a single key term, it’s probably better to keep it short and sweet.
On the other hand, if you're creating a blog post for "comprehensive guide" on some topic then it should be extended but precise at the same point.
At Strell, we provide ideal range for word count by auditing TOP 10 organic SERPs.
You can insert/remove keyword or variations according to your content length or ideal content length.