Metric exported to prometheus recorded for 5 minutes in 15 seconds interval

Describe your environment 
Testing below code in local, once the execution is complete and data is exported to prometheus, I could see in grafana the metric is plotted every 15 seconds for a 5 min duration, even though the execution was triggered only once.

Things that we have tried:

• Set the exportIntervalMillis and exportTimeoutMillis in the PeriodicExportingMetricReader to one sec 
• We also added the shutdown_on_exit=True in the MeterProvider
  both of the above did not change the behavior

Steps to reproduce
exporter = PrometheusRemoteWriteMetricsExporter(
    endpoint="https://endpoint.com",
)
testing_labels = {"environment": "test"}
reader = PeriodicExportingMetricReader(exporter,30000)
provider = MeterProvider(metric_readers=[reader])
metrics.set_meter_provider(provider)
meter = metrics.get_meter(name)

 
def export_to_prometheus():
    metric_one = meter.create_counter(name="metric_one",description="metric one")
    metric_one.add(5,testing_labels)
    metric_two = meter.create_histogram(name="metric_two")
    metric_three = meter.create_up_down_counter(
        name="metric_three",
        description="metric three"
  )  
    metric_two.record(17)
    metric_three.add(56,testing_labels)

if name == "main":
export_to_prometheus(")

What is the expected behavior?

• If we run the execution once, the metric exported should be recorded only once

What is the actual behavior?

• If we run the execution once, the metric exported is being recorded for 5 mins in every 15 sec

Additional context
NA

Can you please help me understand why is the data recorded for 5 mins in every 15 sec intervals, while it should plot the data only once for a specific timestamp?

Start by reproducing the behavior with the provided Python example, focusing on PeriodicExportingMetricReader and PrometheusRemoteWriteMetricsExporter. Trace how the reader schedules exports after the one-time execution and compare the resulting timestamps with the expected single export; done means the cause is identified and covered by a regression test or documented behavior.