time taken by ecfmg to send the credential verification request to medical school

Hi guys,
Can anyone please tell me the time taken by ECFMG to send credential verification request to our college after we send them the Diploma , 344, 345.
I mean could you please tell me the number of days taken between receipt of your diploma by ecfmg and the date on your credential verification request paper sent to your college.
Thanks in advance...:)