Sentence examples similar to every 3rd year from inspiring English sources

What are the skills every 18 year old needs?

The patients were observed every 3 months for 5 years and every 1 year thereafter.

Some cicadas return every 17 year, some return every 13 years.

Elections held every 4 years.

Offered every 2-3 years.

It's going on every 10 years.

I read this every 10 years.

Close oppositions occur roughly every 15 years.

It doesn't happen every 10 years.

They now average once every 15 years.

Fall 2019 (offered every 2-3 years).