A very slight variation, not sure if yours is clearer in meaning than mine.

perl -nle '$count += () = /XY[0-9]+/g; END {print $count}' inputfile

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Cheers,

JohnGG

In reply to Re^2: count the number of occurrences of a pattern in a file by johngg
in thread count the number of occurrences of a pattern in a file by umasuresh

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