write in 3 lines vs write on 3 lines

Some examples from the web:

• You write in your report about border control services.
• We write in code... we write in code.
• Besides legislation, in principle, policy responses may be organised along 3 lines:
• Write in the ashes, so that I may read the future.
• And today he got a machine to write in Braille.
• Every night before going to bed she'd write in it.
• Every night in bed she used to write in it.
• I intend to write in detail about the ones who did not.
• I can write in 'C' language.
• Write in "None of the above" on your ballot.
• People don't write in pictures.
• That's the problem when people write in all caps.
• You must write in your journals everyday.
• Go on home and write in solitude.
• And write in big, clear letters...
• We write in his hand, asking Vargas for help.
• I'm trying to write in there.
• Write in big letters for her eyes are tired... and she cannot read small handwriting.
• I'll write in a day or two.
• At night, I write in the living room.

Some examples from the web:

• Noah Shapiro declined to write on your behalf.
• I have the feeling that I can to write on these enormous partitions... of 3000 or 4000 meter high, as a professor writes on a blackboard with a chalk.
• Besides legislation, in principle, policy responses may be organised along 3 lines:
• That depends on what you write on the medical certificate.
• People who write on walls aren't my friends.
• One of the best students writes on a of the book's maxims.
• The school cannot control what Our children write on a public site.
• Find me something to write on.
• Unable to write on-the-fly with these audio sources.
• And I can write on the card, congratulations, dad.
• You'll need something to write on.
• I have a form for you to write on.
• Give me something to write on.
• No. He just writes on the walls.
• Please write on it "My Friend".
• I could work for Vince during the week and then write on the weekends.
• Like how they write on windows after they saw the social network.
• Write on the paper everything you have done.
• Perfect, I can write on the back.
• So I brought her that to write on.