"historically true" is correct and can be used in written English.
You can use it when you are referring to a statement or idea that is true according to documented or accepted historical record. For example, "The American Revolution was historically true, and is an event which shaped the course of history."
We are interested in the historical, economic and political meaning of Israelite slavery: Was it historically true?
The theory that large companies cannot innovate, he said, "has not been historically true at Bloomberg".
Gingrich said it was historically true and that they had been part of the Ottoman empire.
In addition to sacred mythology there were ordinary stories and tales, either historically true or presumed to be true.
This line of argument, while historically true, is worth pausing over — if only to unpack the moral paradox within it.
"Nabucco was this warrior who took over -- this is historically true -- most of Palestine, including Jerusalem," he said.
That has historically been true unless there are discernible signs of things getting better.
In temperate, intensive agriculture, such field margin habitats, which historically had true agricultural functions, now are important refugia for biodiversity.
Mr. Stoppelman, who is scheduled to testify at the Senate hearing on Wednesday, added, "When it comes to Web search, Google says you have great content, you rise to the top and that's historically been true for us.
While our hair-trigger strategy from up above suggests that familiarity with the United States and much of Europe ought to breed contempt with their stocks now, the reverse has historically been true.
In a telephone interview from his home in New Delhi, Mr. Jha said, "The prohibition on beef-eating has been made a mark of Hindu identity, but this is historically not true".
