OK, I've built a stats table to record what pages were looked at in my site.
I want now, to store the keywords used in a search engine. And I need to know when the keywords were used, so that is why the FK to statistics table, which contains the date.
so isn't this the correct table structure for the keywords?
The other option I was considering was to increment a column for frequency rather than storing each keyword in a separate record. But if I do that, I don't think I can store the date when the keyword was used, either using the date of the site visit or in this keywords_used table.