The duration of the credit can be spread over a period of 10 to 30 years depending on the age of the borrower(s) and the amount of the loan.
Over this duration, two cycles can be distinguished:
the “depreciation(s) of capital” i.e. repayment of capital to the credit provider. In a word, the repayment of the amount lent to you.
the “interest” that must be paid by the borrower.
It is always in your interest to repay the capital as quickly as possible and therefore to favor a fixed rate mortgage loan/credit for the shortest possible duration.
For what ? Because the more capital you repay, the less interest you will have paid upon closing the loan/mortgage credit contract.