She needs to do an AMA.
1 Winter coat
1 Summer coat
1 Dress
1 Jeans/trousers/leggings
2 tops
1 Jumper/cardigan
1 bra
2 pairs pants
That's 9 alone with no socks, gym gear, swim/beach wear, nightwear, gardening/DIY clothes or sufficient underwear to not have to be washing things out nearly every day.
How? Why?
Although you'd be popular on the other thread where people insist you can travel for weeks on end with the smallest free bag airlines allow.