Need to filter data from a file

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# 1  
Old 07-13-2011
Need to filter data from a file

I have a file with hundreds of records.
There are four fields on each line, separated by semicolons.
Height (meters)
Continent (Africa,Asia,Europe,North America,Oceania,South
America,The Poles)

I need to Write the command to find display how many mountains appear in
the list on each continent , like this:
30 Africa
144 Asia
91 Europe
163 North America
11 Oceania
116 South America
3 The Poles

I know I can count it by using Grep and filters but I will need one command per continent. How do I use a single command to list down the output in this format?
# 2  
Old 07-13-2011
In this forum, lot and lot of questions having the same scenario.

read about the sort and uniq command.
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