The phrase "arrived mainly" is correct and usable in written English.
It can be used to indicate that the arrival was primarily or mostly in a particular manner or location.
Example: "The guests arrived mainly through the front entrance, despite the side doors being open."
Alternatives: "primarily arrived" or "mostly arrived".
He arrived mainly through Mark Catlin, the chief executive, who in the same role at Bury saw him propel the club out of League Two in his only previous managerial post before Crawley.
The 2m Turks, who arrived mainly in the 1960s, now run 40,000 businesses in Germany, pay German taxes, have German-speaking children and grandchildren but play almost no part in political life.
In the 19th century and the early 20th century, immigrants arrived mainly from Europe, with more recent immigrants arriving mostly from Asia and the Americas.
Before 2004, Hungarian and Polish migrants arrived mainly after the second world war.
Firefighters are prodigious Fairway customers, arriving mainly in the morning on their trucks, so they can make a quick getaway in case of an alarm.
For use in the lamps and light sockets of your home, LED bulbs have been slow to arrive, mainly because of their high price.
Dutton appeared to connect the immigration program of the 1970s – which saw people arrive mainly from Lebanon, Chile and the Czech republic – with allegations of Sudanese men committing crime, and the descendants of immigrants leaving Australia to fight in the Middle East.
Ghana's markets have flooded with cheap imports, arriving mainly from China in the last decade and under 3,000 jobs now remain in an industry which employed more than ten times that in the 1980s.
But LED bulbs, for use in the lamps and light sockets of your home, have been slow to arrive, mainly because of their high price: their electronics and heat-management features have made them much, much more expensive than other kinds of bulbs.
On the other hand, the element directed at the opposite direction (denoted with opp superscript) will not perceive the direct-path signal, since it arrives mainly from the speaker direction.
Prisoners continued to arrive, mainly from Leavenworth and Atlanta in 1935 and by June 30 , 1935 the penitentiary had a population of 242 prisoners, although some prisoners such as Verrill Rapp had already been transferred from Alcatraz some months earlier.
