mayormente

mostly, mainly, for the most part

mayor major + mente forms adverbs meaning “in a … manner”
adverb Rare #45,513
mostly, mainly, for the most part Looks like English “majorly,” which usually means “very” or “to a great degree.”
SP: Mayormente trabajo desde casa.
EN: I mostly work from home.

Alex es mayormente un pájaro corriente.

Alex is mostly an ordinary bird.

Mayormente guijarros.

Mostly pebbles.

— Sueño de fuga (1994)

"Son mayormente especies nocturnas."

They’re mostly nocturnal species.

— Guardianes De La Noche (2004)

Mayormente retratos.

Mostly portraits.

— Elefante (2003)

Es mayormente cuando estoy escuchando.

It's mostly when I'm listening.

— Toni Erdmann (2016)

Pero mayormente quiere un ascenso y una medalla.

But mostly he wants a promotion and a medal.

— Los chicos del coro (2004)