姻 is a Japanese kanji written with 9 strokes, listed here under the keyword “matrimony”. It is built from 女 (woman) and 因 (cause). In Remembering the Kanji by James W. Heisig it is frame 627.
On KumiJi Glyph Explorer, open the parts search and type “woman” + “cause”. 姻 is among the results, together with every other character containing the same shapes.
Open 姻 in the interactive kanji search
to expand every part down to its smallest pieces, add your own names and mnemonic stories,
or search for other characters by their parts.