The phrase "a past pattern of" is correct and usable in written English.
It can be used when discussing historical trends, behaviors, or occurrences that have been observed over time.
Example: "The study revealed a past pattern of increased rainfall during the summer months."
Alternatives: "a historical trend of" or "a previous tendency of".
Some, for example, will look at a past pattern of rising prices, and assume that the market will continue to skyrocket.
But a Russian hack would fit a past pattern of attempts on government servers, and a member of Putin's ruling party recently expressed a preference for Trump, whose campaign chairman formerly advised a Ukrainian president ousted for his pro-Putin stance.
Interestingly, those with a past pattern of emergency dental visiting had significantly greater odds of visiting the dentist post-questionnaire.
Among those who returned the questionnaire (n = 493), 32% did not visit within the 3 1/2 year period, 36.9% had a past pattern of emergency dental visiting, 9.1% had a past pattern of general dental visiting and 21.9% had a past pattern of both emergency and general dental visiting.
In addition, those who had a past pattern of emergency dental visiting had 2.7 times the odds of making a dental visit post-questionnaire compared to those who did not visit within the 3 1/2 year period.
Those who had a past pattern of both emergency and general dental visiting had 2.2 times the odds of making a dental visit post-questionnaire compared to those who did not did not visit within the 3 1/2 year period.
If a past pattern holds, the number of deaths in 2000 might be significantly lower: Deaths dropped sharply in 1974, 1980 and 1992 -- years when the price of gasoline spiked.
Federal officials say that greater public involvement — open areas for viewing, less than three hours from Denver International Airport — is a significant departure in itself from the past pattern of closed holding areas or remote open ranges.
They will interpret it as evidence that the United States has already made a decision to leave the Afghan battlefield and that it will ultimately repeat its past pattern of abandoning Pakistan periodically.
The report concluded that because of Iran's past pattern of concealment it would take some time before the agency could determine if Iran's nuclear program was intended exclusively for peaceful purposes.
But the I.A.E.A. concluded in the report that "given Iran's past pattern of concealment, it will take some time before the agency is able to conclude that Iran's nuclear programme is exclusively for peaceful purposes".
