Where does “billettkontor” come from?

billettkontor (Norwegian Bokmål) comes from Norwegian Bokmål kontor, from Danish kontor, from Middle Low German kontōr, from Middle Dutch cantoor, from Middle French contoir, from Middle French compter, from Old French compter, from Latin computāre — whale, sea monster; abyss.

billettkontor (Norwegian Bokmål): ticket office, box office

Definitions

ticket office, box office

Ancestry of “billettkontor”, step by step

billettkontor traces back through two separate lines of ancestry.

via Norwegian Bokmål kontor

Step	Language	Word	Meaning
1	Norwegian Bokmål	kontor	an office
2	Danish	kontor	office
3	Middle Low German	kontōr	commercial branch; writing room; counting desk
4	Middle Dutch	cantoor	—
5	Middle French	contoir	Alternative spelling of comptoir
6	Middle French	compter	to recount; to tell
7	Old French	compter	—
8	Latin	computāre	—
9	Latin	computō	to calculate, compute, reckon together
10	Latin	com-	allomorph of con-
11	Latin	con-	Used in compounds to indicate a being or bringing...
12	Latin	cum	with, along with; at; -fold
13	Old Latin	com	Alternative form of cum
14	Proto-Italic	kom	with, along, at
15	Proto-Indo-European	ḱóm	beside, near, by, with
16	Proto-Indo-European	ḱe	Deictic particle, here; Post-positional...
17	Middle English	kyt	—
18	Russian	кит	whale; genitive plural of ки́та
19	Old Church Slavonic	китъ	whale
20	Ancient Greek	κῆτος	whale, sea monster; abyss

via Norwegian Bokmål billett

Step	Language	Word	Meaning
1	Norwegian Bokmål	billett	a ticket
2	French	billet	ticket; note, a brief message; banknote
3	Old French	billette	billet
4	Old French	bille	stick; baton; written decree, announcement
5	Vulgar Latin	billia	—
6	Gaulish	bilia	tall tree
7	Proto-Celtic	belyom	tree
8	Proto-Indo-European	bʰolh₃yom	leaf
9	Proto-Indo-European	bʰleh₃-	bloom, flower
10	Proto-Indo-European	bʰel-	to sound; to speak, roar, bark; shiny, white; to...
11	Proto-Indo-European	bʰōl-	—

Every word from Ancient Greek κῆτος →Every word from Old Church Slavonic китъ →Every word from Russian кит →