[cfunderburg]

Good lord! In my actual writing - zero. I don't use it to produce words for anything. I'm working on a book though and it was useful for building a copy-editor skill and asking it things like:

Am I using british english consistently? Are there any grammatical errors? Etc.

I still feel it's important to fix whatever it finds by hand though.

[DataDaoDe]

This. Its also great for finding out all the ways you are wrong or discovering the views, data, perspectives you are missing. I use it for this as well.