He can show her pictures of the gym uniforms and the customary navy blue one piece.

The on-land ones are baggy and unbecoming and the swimming ones are not modest, but - "If all children wear it, it will not hurt me so to wear it.  If some children do not wear it, I do not want to."

"I think everyone wears it. - well the boys have a different swimsuit."

"I will wear the girls one.  It will not hurt me so."  Sigh.  "I will have two uniforms; I like your idea."

"You have to have more than two. But two at school with you."

"Yes, I want to say that.  At the school, Swan-san writes, we want more than two uniforms.  And more than two for you."

"Every week school is five days. So probably five uniforms."

"For me it will be four."

"On Wednesday you will sleep," he nods.

She mirrors his nod.  "I will sleep every day, but on Wednesday I will sleep and not go to school."  ....She checks Swan-san's chart.  "On Friday I will not sleep.  But a very small amount."

It's an interesting chart. "You will have a lot of time to do homework."

"...Does Swan-san have one job or two jobs?"

"Mama has one job. She is a teacher."

"...All, or many, adults I know - have two jobs."

"Sometimes people have two jobs but usually that is -" Jisho to the rescue. "Part-time work."

Nod.  "I and my adults have more time."

"You..." How do fractions work again... "don't sleep one third of the time."

"Adults I know sleep -" she will follow his example, "one quarter of the time.  I sleep more, almost one third, but not....... fast enough."

"That seems nice."

"It seems more not nice for you..."

"Yes, the need of sleep is bad."

"But there are... small foods... adults can have to need it less.  And they need it less - with no small foods, too."

"Medicine?" As an afterthought he jisho's this so she can see.

"Yes, medicine."

"Kouhii is a loanword," Haru remarks after a moment (to look up "loanword" and pick one of the translations).