第三百二十六天

[nnozomi]

语法
不到 + number + measure word, "less than X" (top of page)
https://resources.allsetlearning.com/chinese/grammar/Expressing_%22less_than%22_with_%22budao%22

词汇
正, exactly; 正在, just now, in process of ( pinyin )

https://mandarinbean.com/new-hsk-1-word-list/

Introductory grammar, day 113

Guardian:
[no 不到 in this sense]
这也是我们正在调查的问题, we are currently investigating this problem also.
这些书到了正确的人手里, these books fell into the right person's hands

Me:
她不到四十岁头发变白了。
我正在做饭，不能接电话。