At what time the precedent will take over the written law?

The precedent does not "take over" the written law, but rather complements and interprets it. Precedent is used by judges to help interpret and apply written laws in specific cases. In common law systems, such as in the United States and the United Kingdom, precedent plays a significant role in shaping the development of the law. However, written laws remain the primary source of legal authority and can only be changed through legislative action.

Precedents generally do not take over written law. Written law typically takes precedence over judicial precedent. However, in common law jurisdictions, precedents can clarify, interpret, or supplement written law, and in some cases, a long-standing line of precedents may effectively overrule written law in practice.