With the Timeline open you can:
A) Drag the end of the walk motion out to the right - this will increase the duration, but will cause her to walk slower.
B) Add the Catwalk motion several times, one after the other, on the Timeline until you have the required time.
Gerry
System: Win 10 Pro (21H2), Asus X99-E WS, CPU i7-5930K -3,5 GHz, 32 GB DDR4 2666-16 RAM, NVidia GTX 1080 Ti GPU - 11 GB VRAM(Driver Studio-536.99), Samsung 850 Pro 512 GB SSD, 6 TB HD storage.