Sentence examples for occurring every fourth year from inspiring English sources

'Leap Years occurring every fourth year mean that the calendar repeats in 28-year cycles.

A crop of seeds is generally produced every year with a bumper crop often occurring every second year.

For example, leap years occur every fourth year that is not a multiple of 100 -- unless it is a multiple of 400.

That kind of heat is supposed to happen every 50 to 100 years in Europe, he says, but "according to the probabilities of climate change, by 2050 such a heat wave will occur every fourth year in France".

Within 20 years the conditions that drove this year's bleaching in Australia will occur every second year.

The Adams River run occurs every year, but every fourth year (called a "dominant" year), the numbers are much higher.

Masting usually occurs every third or fourth year when up to two million seedlings per hectare can be found (Donoso 1975).

On average, drought occurs in Morocco every third year, creating a volatility in agricultural production that is the main constraint on expansion in the sector.

And towards the end of this century the threshold exceedance is projected to occur almost once every second year.

Early field epidemiological studies showed that RHD epizootics occurred annually or occasionally every second year in most rabbit populations although their impact on rabbit populations varied regionally (Henzell et al. 2002).

A drought killed 7,000 farm animals and sickened nearly 100,000.Severe storms normally associated with El Niño periods, every seventh year, now occur regularly.