For a shirt, it would be once.
For a t-shirt, sometimes I might wear one after getting home from work and then go on to wear it again the next day (so what's that, 1.5 days
) ... especially in the cooler months.
"Do not force others, including children, by any means whatsoever, to adopt your views, whether by authority, threat, money, propaganda, or even education." - Ven. Thich Nhat Hanh
"The uprooting of identity is seen by the noble ones as pleasurable; but this contradicts what the whole world sees." (Snp 3.12)
"To argue with a person who has renounced the use of reason is like administering medicine to the dead" - Thomas Paine