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"key in" is an acceptable phrase to use in written English.
It generally means to enter information into a computer system or other electronic device, but it can also mean to type quickly to get something entered in a timely fashion. For example: I had to key in the new customer's information before the end of the day.
Dictionary
key in
verb
To enter data by keyboarding
Exact(59)
The painter approached them, key in hand.
"That was the key in their victory.
The key in both cases is moderation.
Second, teamwork is key in this business.
"Religion plays a key in acceptability".
She slotted the key in the lock.
"It was the key in New York.
CoCo Key in Waterbury, Conn.
That's key in their success.
Typography is key in branding.
Similar(1)
The key-in-lock phenomenon.
Write better and faster with AI suggestions while staying true to your unique style.
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com