Luggage storage lockers at Frankfurt Int'l Airport

Morgen,

Thought this was a good place to post the question, would love to hear of any info! Basically just that: are there lockers at the airport there, the kind you can find at the train stations, where one can keep luggage for a few days? Dad asked about this, and I had no idea what to answer. I also thought that it's not really an option offered normally at aiports, Frkt, or otherwise...never had to use them, so never paid attention. Hoping someone can shed some light on the matter.
Thank you very much.

I found this on the airport website

Hope that helps

thank you kindly!