Come'on man! As I have explained to you a few times already. If you search for a keyword phrase like "summer leggings" and you see ads showing up, it's a term that is regularly searched otherwise why would companies like Victoria Secret, JC Penny and others spend money on the ads for that keyword phrase.
Please clarify what you saw when you searched for "leggings".
I would see someone searching for summer leggings over "yummy leggings", but I know objectivity isn't exactly your forte. I would guess the only realistic searches are sexy leggings, yoga leggings, or simply "leggings".