One possible'slow life frontier novel' could be 'The Virginian' by Owen Wister. While it's mainly a western novel about the frontier, it does have moments that depict a slower way of life. The story unfolds gradually, showing the relationships between the characters, the ranch life, and the code of honor in the frontier. Another option might be some works by Willa Cather, such as 'My Ántonia'. It presents the frontier life in Nebraska, with a focus on the simple, hard - working lives of the immigrants and the beauty of the prairie, which gives a sense of a slow - paced existence.
I'm not sure of specific'slow life frontier novels' off the top of my head. But you could start by looking at classic frontier novels and see if any of them have a slow - life aspect. For example, 'Little House on the Prairie' series by Laura Ingalls Wilder has elements of a slow - paced frontier life, with detailed descriptions of daily activities like farming, building, and family life on the prairie.