I’m going to repeat the process for their jeans page:

After I’ve exported the resulting ranking keywords from SEMRush, added them to my spreadsheet, dropped the categories down and de-duped the list I’ve got 1,300 keywords for Bottoms > Jeans.

I’m going to repeat the process for:

Bottoms > Trousers and Chinos

Tops > Coats and Jackets

Tops > T-Shirts and Vests

For these 3, I didn’t bother putting the River Island domain into SEMRush as ASOS ranked for so many keywords there will be enough data for my training model.

After a quick find and replace to get rid of branded keywords: