Field help (NBRWEE) 

This field is available if the nature of the contract is a training period agreement. Manually enter the number of weeks of the training period.

You cannot enter a number of months and a number of weeks at the same time. If the number of months is already entered, a confirmation message is displayed: click OK if you want to erase the number of months and enter the number of weeks, or click Delete if you want to keep the number of months.