tikkhattuṃ : [adv.] thrice.

A.P. Buddhadatta Mahathera, Concise Pali-English and English-Pali Dictionary [available as digital version from Metta Net, Sri Lanka]

Tikkhattuŋ (adv.) [Sk. trikṛtvaḥ] three times (cp. tayo II. C 2), esp. in phrase vanditvā t. padakkhiṇaŋ katvā "having performed the reverent parting salutation 3 times" VvA 173, 219; t. sāvesi he announced it 3 times J ii.352; DhA ii.4; t. paggaṇhāpesi offered 3 times PvA 74. See also J iv.267; v.382; vi.71; DhA ii.5, 42, 65, 338; iv.122 & passim.

Pali-English Dictionary, TW Rhys Davids, William Stede,