Likely less spoke Greek and lesser still able to read or write it.
Hebrew and Aramaic are closely related, but their style and syntax are widely divergent.
The historical evidence suggests strongly that someone of political or economic influences would be a Greek speaker and reader. Probably the higher on the totem pole would also have good skills on reading and writing Latin. The people in the country and fishermen not as much but in Galilee (of the Gentiles) probably quite some as they bordered and bartered with Hellenistic cities.
It is an historical argument I present to our FRoman FRiends here who assert outside of the city of Rome the early Christians were illiterate bumpkins. On the contrary it was a time in empire history where we see a sophistication of languages amongst the masses.
Paul of Tarsus would not be immune to such an upbringing of multiple languages as well.