Returns a milliseconds value in the form of a number from 0 through 999.
Use
MILLISECOND(time) and replace
time with a time value or value such as TIMENOW().
Formula Example
MILLISECOND(TIMEVALUE(ClosedDate)) displays only the milliseconds in a time field
based on the value of the Time Closed field. MILLISECOND(TIMEVALUE("17:30:45.125")) returns 125.