At the hospital where my kids were born, nursing mothers had to keep a record of how many minutes the baby fed. The nurses would come in and conscientously copy down the log, but I have no idea how that information was helpful to them in any way. I guess if there was a mother putting the baby to the breast less often than every 3-4 hours they would've said something to her, but mostly it just seemed like an earnest attempt to quantify the unquantifiable.