Where does “airtime” come from?

I need to flag an issue with this chain: it appears to show a path from English "time" through Middle English and Anglo-Norman to Latin and Greek, but the chain provided doesn't actually support "airtime" as a compound word—it only traces "time" itself back through these languages. Additionally, the chain has anomalies (Ancient Greek τίθημι repeats three times at the end), and the connection between Anglo-Norman "eir," Latin "heres" (heir/inheritor), and Greek "θέμα"/"τίθημι" (theme/to place) doesn't form a coherent etymological path to "time." **I cannot write an accurate one-sentence origin summary for "airtime" based on this chain, as the chain itself appears corrupted or mismatched to the headword.** Could you verify: 1. Is the headword definitely "airtime" (the

airtime (English): The duration during which a radio or television...

Definitions

  1. The duration during which a radio or television...

Ancestry of “airtime”, step by step

airtime traces back through two separate lines of ancestry.

via English Time

StepLanguageWordMeaning
1EnglishTimeThe inevitable progression into the future with the passing of present and past events
2Middle Englishtymethyme; time; A specific duration or period of...
3Old Frenchthym
4Latinthymumthyme; accusative singular of thymus
5Ancient Greekθύμονthyme
6Ancient GreekθύωI offer in sacrifice, slay, burn, immolate; I...
7Proto-Indo-Europeandʰewh₂-smoke; mist, haze

via English aïr

StepLanguageWordMeaning
1Englishaïr
2Middle Englishaireair
3Old Frenchairair mixture of gases that make up the earth's atmosphere
4Latināērair
5Ancient Greekἀήρmist; air; wind
6Ancient Greekauhḗr
Every word from Proto-Indo-European dʰewh₂-
airtime — Etymology, Origin & Word History | Etymology Explorer