Galatians 1:13-15, Ephesians 2:3, 1 Peter 1:18, 2 Corinthians 1:12, Philippians 3:20
In the KJV it has conversation, in the Lexicon it does not. That may be why you couldn’t find it.
Still in reading there seems to be a difference in the conversation, witness, testimony…for example: when Jesus Christ gave His before Pilate.
Gal 1 KJV 13 For ye have heard of my conversation in time past in the Jews' religion, how that beyond measure I persecuted the church of God, and wasted it:
14 And profited in the Jews' religion above many my equals in mine own nation, being more exceedingly zealous of the traditions of my fathers.
15 But when it pleased God, who separated me from my mother's womb, and called me by his grace,
Eph 2: 3 KJV 3 Among whom also we all had our conversation in times past in the lusts of our flesh, fulfilling the desires of the flesh and of the mind; and were by nature the children of wrath, even as others.
1 pet 1: KJV 18 Forasmuch as ye know that ye were not redeemed with corruptible things, as silver and gold, from your vain conversation received by tradition from your fathers;
2 cor 1: 12 kjv 12 For our rejoicing is this, the testimony of our conscience, that in simplicity and godly sincerity, not with fleshly wisdom, but by the grace of God, we have had our conversation in the world, and more abundantly to you-ward.
Phil 3: 20: kjv 20 For our conversation is in heaven; from whence also we look for the Saviour, the Lord Jesus Christ:
I do not see anythign about a higher calling. Only that our salvation/conversion is from above, not from the flesh.
Thats not a higher calling per say, it is the cause, please of our conversion, salvation, Being born again from above or from Christ
everyone who is saved is converted from this higher place..