It is the church's large international gathering, occurring once a decade.
Large meteor impacts and huge volcanic eruptions are both very rare, occurring once every tens of millions of years.
Twins joined at the head are rare, occurring once in every 2 million to 2.5 million births.
Furthermore, over 66% of the structures are multi-domain proteins; each domain combination occurring once per dataset.
The reactivation of crustal scars is time-dependent, with shifting strain patterns occurring once a fault has localized over time18.
But moderate-size underwater landslides like the one off Papua New Guinea may pose an uneasily plausible risk in some places, occurring once every few hundred years.
Modern digital forensics processes differentiate collection and analysis, with collection ideally only occurring once and the subsequent analysis relying upon proper collection.
The Green Chromatic Coordinate, an index of each crown's greenness, showed rapid large-amplitude positive and negative changes, each generally occurring once per year.
Aspect refers to the nature of an action as described by the speaker e.g., an event occurring once, an event recurring repeatedly, a continuing process, or a state.
Large meteor impacts and massive volcanic eruptions, which spew out hundreds of thousands of cubic miles of lava over hundreds of thousands of years, are both very rare events, occurring once every tens of millions of years.
*Biotinidase deficiency, occurring once in 70,000 births, causing deficiency of the essential B vitamin biotin and resulting in frequent infections, uncoordinated movements, hearing loss, seizures and mental retardation.
