1: δεύτερος
(Strong's #1208 — Adjective — deuteros — dyoo'-ter-os )

denotes "second in order" with or without the idea of time, e.g., Matthew 22:26,39; 2—Corinthians 1:15; Revelation 2:11; in Revelation 14:8 , RV only ("a second angel"); it is used in the neuter, deuteron, adverbially, signifying a "second" time, e.g., John 3:4; 21:16; Acts 7:13; Revelation 19:3 , RV (AV, "again"); Jude 1:5 , "afterward" (RV, marg., "the second time"); used with ek ("of") idiomatically, the preposition signifying "for (the second time)," Mark 14:72; John 9:24 and Acts 11:9 , RV (AV, "again"); Hebrews 9:28; in 1—Corinthians 12:28 , AV, "secondarily," RV, "secondly."

Acts 13:33
2: δευτεραῖος
(Strong's #1206 — Adjective — deuteraios — dyoo-ter-ah'-yos )

an adjective with an adverbial sense (from No. 1), is used in Acts 28:13 , RV, "on the second day" (AV, "the next day"), lit., "second day (persons we came)."

Luke 6:1