The answer to 'frequency of retaining wall installation' is that there is no single, universal frequency for when a retaining wall should be installed. The need for a retaining wall depends on the specific landscape, soil conditions, and construction requirements of a property. Generally, retaining walls are installed when there is a significant slope or grade change on a property that needs to be stabilized and supported. This is often the case in hilly or sloped areas, where the wall helps prevent soil erosion and maintains the integrity of the landscape.
Retaining walls may need to be installed when building a new home, renovating an existing property, or making changes to the outdoor space. They can also be added over time as the landscape evolves and requires additional support. Consulting with a professional landscaper or engineer is recommended to determine if and when a retaining wall is necessary for a specific property.