accounts, bill, debt, credit
賬 centers on financial records and obligations: accounts, bills, debts, and credit. It represents the tracking of money owed or due.
賬 combines 貝 (shell, used historically for money) with 長, which likely contributes the sound. The character expresses financial accounts and debts.
The left side 貝 represents money or currency, and the right side 長 suggests something long or extended. Picture a long scroll of accounts and bills made of shell money: 賬 is all about financial records.
For チョウ, imagine a long account book labeled with the name Chou: Chou -> チョウ, and the book is full of debts and credits.