How long will it take to update the gallery?

I have added the widget to a page – but how long will it take to get the photos updated from instagram to the page. The images is there.. but it is only 2 showing up.

I update the page and nothing happends.. and suddenly one more is added… but it takes a long time…

So do you have any idea how long it takes?

https://www.ads-software.com/plugins/instagram-image-gallery/