How to find the number of occurrences of a string in file using windows command line?

Question

I have a huge files with e-mail addresses and I would like to count how many of them are in this file. How can I do that using Windows\' command line ?

I have tried

Answer 1

This is how I do it, using an AND condition with FINDSTR (to count number of errors in a log file):

SET COUNT=0
FOR /F "tokens=4*" %%a IN ('TYPE "soapui.log" ^| FINDSTR.exe /I /R^
 /C:"Assertion" ^| FINDSTR.exe /I /R /C:"has status VALID"') DO (
  :: counts number of lines containing both "Assertion" and "has status VALID"
  SET /A COUNT+=1
)
SET /A PASSNUM=%COUNT%

NOTE: This counts "number of lines containing string match" rather than "number of total occurrences in file".