Response from Henrik Lindström
They will go away eventually as the suggestion statistics have a time to live of 45/90/180 days depending on account type, but there is currently no way of removing suggestions that once had hits. You can of course hit a multisearch count query for each suggestion to check if it still exists (it should be fast and basically only be the round trip time to the server.
We are using the built in autocomplete, but has extracted the code that the rest service do, and made our own service that returned the information in the way we wanted it. Maby this is not nessesary and I will change it if there are any better suggestions.
The problem we have is that it is returning suggestions on words that will get no hits, for example if you go to http://www.lernia.se and type rekryteringskoordinator in the search field you will get a suggestion but if you search for it there will be no hits. It has been hits on that word before, but the page with that word has been deleted and is no more in the index.
Are there any way to fix so these suggestions will go away?