Create delay between two message reads of a Queue?

I am using Azure Queues to perform a bulk import. I am using WebJobs to perform the process in the background. The queue dequeues very frequently. How do I create a delay between 2 message reads?

This is how I am adding a message to the Queue

public async Task<bool> Handle(CreateFileUploadCommand message)
{
    var queueClient = _queueService.GetQueueClient(Constants.Queues.ImportQueue);

    var brokeredMessage = new BrokeredMessage(JsonConvert.SerializeObject(new ProcessFileUploadMessage
    {
        TenantId = message.TenantId,
        FileExtension = message.FileExtension,
        FileName = message.Name,
        DeviceId = message.DeviceId,
        SessionId = message.SessionId,
        UserId = message.UserId,
        OutletId = message.OutletId,
        CorrelationId = message.CorrelationId,

    }))
    {
        ContentType = "application/json",
    };

    await queueClient.SendAsync(brokeredMessage);

    return true;
}

And Below is the WebJobs Function.

public class Functions
{
    private readonly IValueProvider _valueProvider;
    public Functions(IValueProvider valueProvider)
    {
        _valueProvider = valueProvider;
    }

    public async Task ProcessQueueMessage([ServiceBusTrigger(Constants.Constants.Queues.ImportQueue)] BrokeredMessage message,
    TextWriter logger)
    {

        var queueMessage = message.GetBody<string>();

        using (var client = new HttpClient())
        {
            client.BaseAddress = new Uri(_valueProvider.Get("ServiceBaseUri"));

            var stringContent = new StringContent(queueMessage, Encoding.UTF8, "application/json");

            var result = await client.PostAsync(RestfulUrls.ImportMenu.ProcessUrl, stringContent);

            if (result.IsSuccessStatusCode)
            {
                await message.CompleteAsync();
            }
            else
            {
                await message.AbandonAsync();
            }
        }
    }
}