There is no actual timeframe. The data is regularly updated by Facebook and reflects the real time activity of members. This means that the results of the same profiling performed at two different times can present variations.
Our observations have shown us that there are significant variations in results for the same profiling project generated with a three month interval at a minimum. In any case, in the context of specific events such as global events ( Olympic games, Festivals, etc.), the  variations of results can be significant despite a time interval of less than 3 months.