How to Use FINDB in Google Sheets in 2020?

FINDBReturns the position at which a string is first found within text counting each double-character as 2.
Sample Usage

FINDB(“新”, “农历新年”, 2)

Syntax

FINDB(search_for, text_to_search, [starting_at])

search_for – The string to look for within text_to_search.
– The text to search for the first occurrence of search_for.
starting_at – [ OPTIONAL – 1 by default ] – The character position within text_to_search at which to start the search.

Notes

If search_for is not found, the #VALUE! error value is returned.
Ensure that search_for and text_to_search are not supplied in reverse order, or the #VALUE! error will likely be returned. The arguments are supplied in a different order than other text functions such as SPLIT and SUBSTITUTE.
It’s recommended to use a function such as IFERROR to check for cases when there aren’t matches to the search.
Use FIND for standard character sets, and FINDB for double-byte character sets such as Japanese, Chinese (Simplified), Chinese (Traditional), and Korean.

See Also

FIND: Returns the position at which a string is first found within text, case-sensitive.

SEARCH: Returns the position at which a string is first found within text, ignoring case.

SEARCHB: Returns the position at which a string is first found within text counting each double-character as 2.

REPLACE: Replaces part of a text string with a different text string.

REGEXREPLACE: Replaces part of a text string with a different text string using regular expressions.

REGEXMATCH: Whether a piece of text matches a regular expression.

SUBSTITUTE: Replaces existing text with new text in a string.

SPLIT: Divides text around a specified character or string, and puts each fragment into a separate cell in the row.