Does anyone have pandemic-themed mnemonics to share? Here’s mine
人数（にんずう）Number of people
This word is great for counting the NUMBER OF PEOPLE (にんず) who are staying home during a pandemic.
It’s ずう instead of すう, because when people stay home, the wild animals can roam the streets in safety. It’s like the ZOO is turned inside out, with the animals looking in people’s windows and wondering about the NUMBER OF PEOPLE (にん) in the ZOO (ずう).