At one- to six-month intervals, use a dry-cleaning powder to clean areas of heavy traffic.

The project estimates that additional years will be cataloged at six-month intervals.

Google has committed to releasing such data at six-month intervals, and the data now goes back 18 months.

Her last two dozen novels, for example, appeared at roughly six-month intervals up to her death.

The Odyssey surveys, based on interviews with 2,500 people, have been conducted at six-month intervals since 1994.

It began as an annual but by its end it was appearing at six-month intervals.

The court accepted the recommendation, though the former couple have alternate custody of the girls, in six-month intervals.

Notable contributors for each of its volumes (six-month intervals) are summarized below.

After the elections, Israeli withdrawal from rural areas would continue at six-month intervals.

The last two installments of aid were for six-month intervals.