Dear Perl Monks I'm looking for advice for my problem. I have two large texts with same number of lines. In fact they are parallel texts in two different languages. I want the statistics of each term occurred in each file plus the line number for each one since I will later calculates the terms that happened to be in the same line. for example: 
FILE1:
this is an example.
the example is just for display.
how to solve it in an efficient way?

FILE2:
este es un ejemplo.
el ejemplo es sólo para mostrar.
cómo resolverlo de una manera eficiente?

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later I want to extract for example that how many times "un" and "and" happened to be in a same line of the files. Since the files are big, I have to reprocess them inside my codes, so I prefer a code to be efficient. I know some solutions which are not really efficient nor the good solution for this and I'm not an expert of perl nor very beginner ;) Your advice is appreciated.

In reply to term frequency and mutual info by perl_lover_always

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