41.   The client will usually require the engineer to inform him or her of the likely final cost of construction at regular intervals.

42.   Knock in a series of pegs at regular intervals to obtain an overall general level.

43.   The code is reviewed at regular intervals.

44.   At regular intervals, she listened to the news on the radio.

45.   The road ran straight ahead, the telegraph poles passing at regular intervals to the right..

46.   The various trade and commercial directories that were published at regular intervals during the nineteenth century are a particularly useful source for the study of old market towns.

47.   Meanwhile, pipe decorative lengths down the skirt at regular intervals, and little rosettes on top.

48.   The second part of the scheme would provide a means of assessing the general state of the water environment at regular intervals.

49.   They had settled down to happy domestic bliss and a couple took strict turns to collect pay and rations from Aviemore railway station at regular intervals.

50.   There must be procedures for determining the market price for a contract at regular intervals, even in a thin market.