How many days to take article approval

Article approval is based on the website you submit. For example, if you are submitting on Hub Pages then it would be reviewed in 24 hours. And paid submission gives you immediate approval.Free article that is depend on site admin.

That is depend upon the websites in which your submitting the article.

Usually it will take 24 hours but for the reputable article submission sites it will take days or a week due to work load.