quot-annīs or quot annīs adv.,
every year, year by year, annually, yearly: ubi piratae fere quot annis hiemare solent: quot annis singula milia, Cs.: Hic illum vidi iuvenem quot annis, V.
quŏtannis, v. quot. ...
A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.