fall off
US /fɔːl ɔːf/
UK /fɔːl ɔːf/

1.
abfallen, nachlassen
to decrease in quantity or quality; to decline
:
•
Sales tend to fall off during the winter months.
Die Verkaufszahlen neigen dazu, in den Wintermonaten abzufallen.
•
His performance has started to fall off recently.
Seine Leistung hat in letzter Zeit begonnen nachzulassen.