The phrase "a major influence when" is correct and usable in written English.
It can be used to indicate a significant impact or effect that occurs at a specific time or under certain circumstances.
Example: "The economic policies of the government were a major influence when shaping the country's recovery after the recession."
Alternatives: "a significant factor when" or "a key impact when".
Do you have any major influences when it comes to your style?
Health consciousness is related to the participation in prostate cancer screening; for example, according to a national survey, physician counsel and patient prevention consciousness are the major influences when a patient decides to attend prostate carcinoma testing in the United States [27].
He was there to pay his own tribute: to the soul singer Solomon Burke, who died last year and was one of Mr. Jagger's major influences when the Rolling Stones began.
Major influences when predicting the re-entry time are the changing precision of the available orbital data, the satellite's ballistic coefficient, the activity of the sun which influences the Earth's atmosphere and the underlying quality of the atmospheric model.
She also alluded to pop singer Taylor Swift, who had a major influence on the music industry earlier this year when she convinced Apple to compensate artists featured on its new streaming platform.
Now he's a major influence on my style, but things got a lot better when I started doing more me and less of Terminator.
Pistorius credits his mother, who died at the age of 43 when Pistorius was 15 years old, as a major influence in his life.
In the few cases, when medical or environmental factors might have had a major influence on a particular behavior, the codings for these behaviors were treated as inapplicable.
Thus, it appears that diet composition may have a major influence on mitochondrial ROS production and should be considered as a factor when comparing results between studies.
But strangely my book work is a major influence of my ice cream… more will be revealed by next year I hope, when I open my own parlour.
