I looked up the same word using Wordtracker and Good keywords V2.0 and come up with some vastly differing amount of times viewed for the word Dog WT came up with 67,506 and GK came up with 1,036,441 and puppy Wt came up with 11,716 and GK 507,772. How is it that there are such large differences and if I was going to use those words should I take the lowest figure or average them out?
If I remember right, Good Keywords uses Overture's database, which many believe to be not so useful. I read that Overture's numbers are over-inflated and misrepresented. If I were you I'd assume the lower figure.