The phrase "a pattern that has become" is correct and usable in written English.
It can be used to describe a trend or behavior that has developed over time.
Example: "In recent years, a pattern that has become increasingly evident is the rise of remote work among professionals."
Alternatives: "a trend that has emerged" or "a phenomenon that has developed".
IT IS a pattern that has become common in Central Europe: the repackaged communists are back.
What followed was a pattern that has become depressingly familiar to observers of the team over the past decade, with the team yoyo-ing between thumping losses and semi-convincing wins.
The aftermath of the horrific terrorist attack that struck Brussels on Tuesday has followed a pattern that has become glumly familiar from its 7/7, Charlie Hebdo and Bataclan forerunners.
In a pattern that has become depressingly familiar, suicide bombers affiliated with the Islamic State drove a car bomb into the compound gates, killing up to six people and injuring dozens more.
"The administration tramples on the actual legislation passed by Congress and seeks to impose its own policy choices — a pattern that has become all too common in this administration".
WASHINGTON — In a pattern that has become familiar, the Federal Reserve said on Wednesday that the economy was growing more slowly than it had forecast, in part because its efforts to hasten recovery had proved insufficient.
They form part of a pattern that has by now become something of a chestnut among students of American political history.
But the report documents a pattern of crime that has become synonymous with the Chicago or Illinois "way" of doing things.
Similarly, right wingers who assert that it is now Obama's economy and that the Republicans have nothing to do with the current state of the economy are continuing a pattern of avoiding responsibility that has become a core principle of that party.
And for most Indians the decisions are not merely connected, but fall in line with a pattern of moral regulation that has become standard practice for the nationalist BJP since it was elected into power last year.
Yesterday's move to preserve traditional rigour in education fits into that pattern; it also attacks a flank that has become vulnerable for the Conservatives, after their divisive grammar school row.
