[WealthWithin]

I'm confused about the following figures.


I searched for a keyword and it's shown in Market Samurai as,
Number of searches daily - 4,438

I checked the same keyword in Google AdWords tool, and I got,
Global Monthly search volume:
Exact match - 1,600
Phrase match - 40,500
broad match - 74,000


I know what broad match is, but
1. What's the difference between exact match and phrase match?
2. How did MS get 4,438? I can't see any relationship with Google's results.


Thanks,
WealthWithin.