nostr:nprofile1qqsywt6ypu57lxtwj2scdwxnyrl3sry9typcstje65x7rw9a2e5nq8spz4mhxue69uhk2er9dchxummnw3ezumrpdejqz8mhwden5te0vf5hgcm0d9hx6ctcd9kkzmrfwd68xtn0dekxjmn9qy28wumn8ghj7mn0wd68ytn00p68ytnyv4mqu0s8zt and nostr:nprofile1qqsqfjg4mth7uwp307nng3z2em3ep2pxnljczzezg8j7dhf58ha7ejgprdmhxue69uhhyetvv9ujucnfw33k76twwpshy6ewvdhk6qg5waehxw309aex2mrp0yhxgctdw4eju6t0qyt8wumn8ghj7un9d3shjtnswf5k6ctv9ehx2aq93vhd7

TIL biennial and biannual are 2 different words. As you pondered one rhr.

Twice a year = biannual

Every 2 years = biennial

Bonus; triennial...