There are 'peaks and valleys' [=very high and very low levels] in electricity usage during the summer.
Phone calls cost more during 'peak' calling hours. [=the time period when most calls are made]
The graph shows that murders in the city declined from a 'peak' of 173 in 2004.
(..) You alone are the food jamming mouth, aren't you? Enough! Food! Prepare for ice age! Protect the Dodo valley! Survivals separate the Dodo off the peak! Protect the Dodo valley! Prepare for ice age! Ice age? I've heard of these cracks, buddy. Intruders! (..)2002 Ice Age
(..) That's Diego, fall back! Where's the baby? I lost it over the falls. You lost it? I want that baby, Diego. I'll get it. You better. Unless you want to serve yourself as the replacement. We'll go up to half peak. Meet us there. It'd better be alive. Can we trust you with that, Diego? Let's go! (..)2002 Ice Age