13-2.ts

import { GraphWidget, IWidget, Metric } from "@aws-cdk/aws-cloudwatch";
import { Construct, Duration } from "@aws-cdk/core";

const invocationWidget = new GraphWidget({
    width: 24,
    title: 'title',
    left: [new Metric({
        metricName: 'Count',
        namespace: 'AWS/ApiGateway',
        dimensions: {'ApiName': 'apiName'},
        statistic: 'sum',
        label: 'Count',
        period: Duration.hours(3)
    })]
});