Units To lays out frequency units one to a row and amounts one to a column, so any amount reads in every unit at once: hertz, revolutions per minute, kilohertz, millihertz, beats per minute and megahertz, and for fun, heartbeats, hummingbirds’ wings and concert as. Type an amount the way you would say it, lay out a range of amounts, and choose how many decimal places to show.