How do you crawl on a site like this?

The frame is inside, so you can't load it as it is.

If you right-click on the table and go into the frame source view, The tickets are being dynamically loaded in the following way.

https://www.weather.go.kr/cgi-bin/aws/nph-aws_txt_min_guide_test?0&0&MINDB_01M&4108&a&K

Above is the address (0&0) when the current time is specified, and if you set a specific time zone and check the frame source view again, it is shown below.

https://www.weather.go.kr/cgi-bin/aws/nph-aws_txt_min_guide_test?202007272014&-60&MINDB_01M&0&m&K

202007272014&-60&MINDB_01M&0&m&K shows the following format:

"Date" (20200727)"Time" (2014)&"After a few minutes" (-60)&MINDB_01M&0&m&K

Please specify the desired date, time, and minutes and call them to the address.

Thank you.