Explanation for error codes -6007 and -6009

I keep getting the following errors from the /sapi/v1/lending/daily/redeem endpoint from time to time:

  • {"code": -6007, "msg": "not in redeem time"}
  • {"code": -6009, "msg": "request frequency too high"}

I couldn’t find any explanation on the error codes. I also couldn’t find any documentation on rate limiting that would cause the -6009. I’ve checked the following sources:

Any explanation is much appreciated.