What is a literary device used in Chapter 6 of The Mixed up Files of Ms. Basil E. Frankweiler?

"Step, pause. Step, pause." Repetition, pg. 89

"The weight of the statue crushed all the velvel down except where the marble was chipped away and the plush was crushed up. Claudia, there's a crushed-up W in one of those circles that is also crushed up." Repetition, pg. 91