The NCLEX is offered 5-7 days a week through the year in most of the US. It has been offered continuously for quite a few years now since becoming computerized. Not sure where you got the idea that it's offered only. 2x a year. You must graduate from your nursing program and apply to the board of nursing for licensing by examination. The register at Pearson Vue and pay the $200 NCLEX testing free. Once approved and authorized to test you schedule the NCLEX through Pearson Vue.
Canada offers their licensing exams 3x a year. The NCLEX is offered continuously except for legal holidays. Many sites offer Saturday, Sunday and evening exams