Using Linux commands, I am trying to make a histogram of all three word sequences (trigram) in a database given. It needs to be sorted in decreasing order of occurrence, it needs to be case insensitive and punctuation needs to be ignored. There should be a column where it counts the number of times the trigram occurred, a column where it calculates the percentage each was used and a column that keeps a running sum of the percentages in the percent column.

The output of your command line should be:

Trigram	Frequency
	No.	Percentage	Cumulative
see jane run	3	37.5000%	37.5000%
jane run see	2	25.0000%	62.5000%
run see john	1	12.5000%	75.0000%
see john run	1	12.5000%	87.5000%
run see jane	1	12.5000%	100.0000%