Google Search – Where to Find Related Google Searches for a Given Query

In Google, "Search settings", "SafeSearch Filtering", setting your search filter to 'strict' will return you pretty good safe results.

In Bing, under "Preferences", use the "disable filtering" dialog. It allows to display parental hits. See bing.com/settings.aspx.

I can't help you with the list of any “top” rating, but!

This tool by Google gives you ability to see the amount of searches for any phrase. The default setting is so-called “broad” match data — so, if you key in recipe, you will see amount of searches for all queries that have “recipe” in them, in any form.

It won't give you a rating, but it will show you the absolute amount of monthly searches, possibly filtered by language and/or country.