And it saves results so that whenever you open the program, you have a list of previous searches. Copernic offers it free because you are shown unobtrusive banner ads. There are two commercial versions that let you bypass the ads and get extra features. I've been trying the Pro edition for a few weeks. The best thing I can say about it is it's very fast.
Results appear almost instantly.
The worst thing I can say is that it is needlessly complicated to set up properly and often confusing in the information it returns. So, using Copernic 2001, I entered the phrase with quotation marks around the two words to look for the exact phrase. Copernic returned 48 hits. There were several obscure references to the term from some online chat rooms. David Letterman Top 10 list that didn't contain the phrase or even the individual words.