wordcount displays all the words of the specified length with the number of times they occur.

Here is a sample session with wordcount:

% wordcount embl:rnu68037 -wordsize=3
Counts words of a specified size in a DNA sequence
Output file [rnu68037.wordcount]:

Mandatory qualifiers:

[-sequence] (sequence)

Sequence USA.

-wordsize (integer)

Word size.

-outfile (outfile)

Output filename.