The frequency which Google indexes sites is due to a number of variables, including popularity, frequency of the content being updated. Some get indexed daily, others weeks others months.

If you have access to the server logs you can check to see how often Googlebot has crawled the site.

If Google crawls your site three times in a month and it hasn’t been changed, it learns to not come back and re-index for a while. A big update could improve indexing frequency, but if it has been a long time since, then Google might take a while to come back to find out whether any of the content has been changed. If you are signed up to Google webmaster tools you can set the Googlebot to spider your site more frequently and this should pick up new pages. If you have old pages and want to redirect them to new pages, you can do this with a 301 redirect. Other methods recaching your website can include, creating a dynamic sitemap with priorities and change frequencies set. If you create a new site you can always resubmit it to Google or just create a link from a pageranked web page from an external site.

But to be honest the long and the short of it is you will have to wait for Google to process your changes. There are things you can do to speed up this process, but there is no “on” “off” button.