As earlier peopl have said that there is no fixed time and if you contact google, they also wont give you a fixed time period there reply will be that we update it regularly in few weeks.

But while the sitemap is not indexed, if you make any changes in the websites then make sure to resubmit your sitemap.

As earlier people have said that there is no fixed time and if you contact Google, they also won't give you a fixed time period. Their reply will be that we update it regularly in few weeks.

But while the sitemap is not indexed, if you make any changes in the websites then make sure to resubmit your sitemap.