No keyword tool provides exact data on search frequencies. Rather, it is important to get a feel for search frequencies. If you want to be certain about this, you can generate reliable data relatively quickly with a small Adwords test campaign.
The paid keyword research tool “Keyword Discovery” has probably the most extensive keyword database with a database of around 32 billion keywords from over 200 search engines. As with Wordtracker, there is also a free entry-level version of Keyword Discovery that spits out up to 100 keywords for each search term.
However, the estimated search frequency for keywords database is significantly higher than for Wordtracker. This is because Wordtracker reports daily search volume, whereas Keyword Discovery reports annual estimates.
Please always note that the specified search frequencies should only represent an estimate. With this tool, too, the delivered keywords can be clicked, which gives an even finer evaluation.
With the Keyword Research Tool and the associated keyword database, we enable you to research search terms and search behavior patterns on a specific topic.
Since the trend in the search engines is moving more and more towards “Universal Search” and “Rich Snippets”, you should find out as much information as possible about a keyword for your optimization. Here you can do more than just “find search terms”.