The Wheelbarrowed Sow

At 9am. on Monday 1 November, the farmer went into the yard, loaded the sow in the wheelbarrow and headed off to a neighbouring farm to have her serviced by a boar.
At 9 am. on Monday 8 November, the farmer went into the yard, loaded the sow in the wheelbarrow and headed off to the boar again.
At 9 am. on Monday 15 November, the farmer went into the yard, loaded the sow in the wheelbarrow and headed off to the boar.
At 9 am. on Monday 22 November, the farmer went into the yard”and found the sow sitting in the wheelbarrow.