Best way to CRON a service function

Question

We have a .net 6 worker service.

Within this worker there is an injected scoped dbcontext as well as an injected service that uses this context.

The service looks something like this:

Publc ServiceConstructor(Mycontext context)
{
    _dbContext = context;  <---- scoped injected db
}

Public async Task DoWork()
{
    //Do Work
}

Startup has:

services.AddScoped<Mycontext>();
services.AddScoped<Myservice>()

And in my worker's ExcecuteAsync()

using(var scope = _serviceProvider.CreateScope()){

   //get service here using getrequiredservice
}

The problem I am facing is that I need to schedule doWork using cron. But also keeping in mind that a second and 3rd service will be added and 2 of them will run at the same time and the 3rd on a different time. But all 3 should be easy to set a new time.

Is there an easy way to schedule all 3 service functions individually?

All 3 will use the same database.