How often does the crawl update?

Frase crawls update on a weekly basis. However, you can always import or refresh content manually at your convenience. 

If you would like import content manually, navigate to "Knowledge" > "Crawls", then select your crawl of interest, and click "Import Content" on the top right corner. Paste your URL/s and click "Import".

If you would like to update a specific page, open you crawl, and click the "Refresh" icon to the right of your target page.