I think I googled frequency of cellphone waves. I had just sent my sister a text including "hugs across the cell towers" and it got me to thinking. Well, this is the link I chose - wavelength of wi fi. I love these relative puzzles. Sometimes I picture 2 thousand Barbie dolls treading water between the crests of 2 waves at the beach. I lived at Holden Beach for a few years when I was in high school. I think the Barbie dolls represent water molecules in proportion to the length of a wave of green light. Might be wrong, haven't done that meditation in a while. I also can't remember why I used Barbie dolls in the visualization, maybe because they make me think of a super long line of Rockettes at Radio City Music Hall. When I lived in Vienna, VA I went to a dance school led by the coolest teacher. Her name was Mrs. Cuppet. My mom said she had was a former Rockette.
Below is chart for 9:30, a minute or two after I read the linked article. I liked the article so much I wanted to save it somewhere handy.