update doc wording

README.md

@@ -48,7 +48,7 @@ Parameters:
   * `ignorePatterns` an array of objects holding regular expressions which a link is checked against and skipped for checking in case of a match. Example: `[{ pattern: /foo/ }]`
   * `replacementPatterns` an array of objects holding regular expressions which are replaced in a link with their corresponding replacement string. This behavior allows (for example) to adapt to certain platform conventions hosting the Markdown. Example: `[{ pattern: /^.attachments/, replacement: "file://some/conventional/folder/.attachments" }]`
   * `ignoreDisable` if this is `true` then disable comments are ignored.
-  * `retryOn429` if this is `true` then retry request when response is an HTTP code 429 and retry within the delay indicated by `retry-after` header.
+  * `retryOn429` if this is `true` then retry request when response is an HTTP code 429 after the duration indicated by `retry-after` header.
   * `aliveStatusCodes` a list of HTTP codes to consider as alive.
     Example: `[200,206]`
 * `callback` function which accepts `(err, results)`.
@@ -151,7 +151,7 @@ Options:
 * `ignorePatterns`: An array of objects holding regular expressions which a link is checked against and skipped for checking in case of a match.
 * `replacementPatterns`: An array of objects holding regular expressions which are replaced in a link with their corresponding replacement string. This behavior allows (for example) to adapt to certain platform conventions hosting the Markdown.
 * `httpHeaders`: The headers are only applied to links where the link **starts with** one of the supplied URLs in the `urls` section.
-* `retryOn429` if this is `true` then retry request when response is an HTTP code 429 and retry within the delay indicated by `retry-after` header.
+* `retryOn429` if this is `true` then retry request when response is an HTTP code 429 after the duration indicated by `retry-after` header.
 * `aliveStatusCodes` a list of HTTP codes to consider as alive.
 
 **Example:**