Example sentences of "[to-vb] at least once a [noun] " in BNC.
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1 | It was just as I had remembered it for over thirty years , it was just as it used to appear at least once a week at lunch in the Paris household where I spent two years of my youth with a greedy Norman family : two years of study interspersed with the most trying of family meals , endless and infinitely to be dreaded but for the blessed beauty of the food . |
2 | The world 's dominant religions require members to worship at least once a week and to attend a major festival every three months . |
3 | Whereas the inexperienced glider pilot needs to fly at least once a month to be safe , more experienced pilots can go much longer without always becoming badly out of practice . |
4 | The commissions , which were to recommence work before Jan. 14 , were instructed to report at least once a month to the heads of state who were scheduled to meet again in Rwanda on March 14-15 . |
5 | It will also need clipping or pruning to shape at least once a year , especially in the case of formal hedges . |