Four times in Chumash:
ויתמהמה (Vayeira, Gen. 19:16)
ויאמר (Chayei Sarah, Gen. 24:12)
וימאן (Vayeishev, Gen. 39:8)
וישחט (Tzav, Lev. 8:23)
and three times in the rest of Tanach (excluding Tehillim, Mishlei, and Iyov, which use a different system of trop):
ונבהלו (Is. 13:8)
ויאמר (Amos 1:2)
ואמר-לה (Ez.Ezra 5:15)