UNIX for Dummies Questions & Answers

Hi,
I have a file with hundreds of records.
There are four fields on each line, separated by semicolons.
Name
Height (meters)
Country
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?

In this forum, lot and lot of questions having the same scenario.

read about the sort and uniq command.