by chance

He said it would have been "the last approach any parent would have wanted in the circumstances", but by chance the couple were away.

The couple only got married at Pimhill Barn by chance after another booking dropped out and it became available.

She was found by chance when a shepherd, who had taken his goats to the area for grazing, heard faint cries coming from under a mound of earth.

Global supremacy doesn’t happen by chance, which means Swift can leave nothing up to the fates.

Frazer Walsh's journey to working with lions didn't begin in a lab or lecture hall - it started with a job advert he spotted by chance.