The phrase "a pattern which began" is correct and usable in written English.
You can use it when describing the initiation of a recurring theme or trend in a particular context.
Example: "The researchers observed a pattern which began to emerge in the data over the last decade."
Alternatives: "a trend that started" or "a pattern that originated".
We concentrate on the data analysis for the 2011 To-hoku Earthquake to clarify the seismicity migration pattern which began at the foreshock and lasted until the main-shock.
You can thread them on randomly, follow a pattern which is repeated or begin at the centre for a symmetrical design.
Baughcum and colleagues found that the low income mothers in their study weaned their infants prematurely; a pattern was identified which began with early introduction of rice and cereals and moved onto age inappropriate feeding of other solid foods[ 11].
Last week, the police classified the two attempted rapes as part of a pattern of five attacks, which began in Queens Village.
Apple follows a similar pattern with OS X, one which began taking shape with Snow Leopard, with lower upgrade costs for it and subsequent versions, and culminating with the release of Mountain Lion this year, just one year after the introduction of Lion in 2011.
Avid moviegoers will remember "A Man Called Horse," which began to establish the pattern, and "At Play in the Fields of the Lord".
Finally, in contrast to all of the patterns discussed so far, which began with a marked response at 6 h, a limited but significant number of genes showed relatively little response until the 48 h time point.
Brown is also, his book reveals, prone to a strange affliction of tics, rituals and other patterns of obsessive behaviour, which began in childhood with a compulsion to knock his knees together, and didn't end there.
Officials here said the incident fit a pattern of suicide bombings by women, which began in the Chechnya region late last year.
Wolfe is determined to break this pattern of disease transmission, which began ten thousand years ago, with the rise of agricultural communities and domesticated livestock.
