[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [Schedule](https://evolu.dev/docs/api-reference/common/Schedule) › repetitions

```ts
function repetitions<Output, Input>(
  schedule: Schedule<Output, Input>,
): Schedule<number, Input>;
```

Defined in: [packages/common/src/Schedule.ts:1570](https://github.com/evoluhq/evolu/blob/037c390af081e9944d616ff298a729515c5c5ab7/packages/common/src/Schedule.ts#L1570)

Wraps a schedule to output the number of repetitions instead of original
output.

Outputs 0, 1, 2, ... while preserving the underlying schedule's timing and
termination behavior.

### Counting repetitions

```ts
import {
  assertOk,
  exponential,
  repetitions,
  testCreateDeps,
} from "@evolu/common";

// Count retries while preserving exponential timing.
const step = repetitions(exponential("100ms"))(testCreateDeps());
assertOk(step(undefined), [0, 100]);
assertOk(step(undefined), [1, 200]);
```