Azure App Config Caching

With Azure App Config how can I ensure to read only once a day from a key? I tried:
config.AddAzureAppConfiguration(options =>
{
options.Connect(azAppConfigConnection)
.Select("dbConnectionString", "Production");

                options.ConfigureRefresh(refresh =>  
                {  
                    // Register for refresh operation.  
                    refresh.Register("dbConnectionString", "Production").SetCacheExpiration(TimeSpan.FromSeconds(86400));  
                });  
                refresher = options.GetRefresher();  
            });  

The above snippet to read only once a day, but it still keeps on reading for every request. I am not sure of what I am missing. Any help would be much appreciated.