Fixed Spelling.

twitter-core/src/main/java/com/twitter/sdk/android/core/services/FavoriteService.java

@@ -40,7 +40,7 @@ public interface FavoriteService {
      *              equal to 200. Defaults to 20.
      * @param sinceId (optional) Returns results with an ID greater than (that is, more recent than)
      *                the specified ID. There are limits to the number of Tweets which can be
-     *                accessed through the API. If the limit of Tweets has occured since the
+     *                accessed through the API. If the limit of Tweets has occurred since the
      *                since_id, the since_id will be forced to the oldest ID available.
      * @param maxId (optional) Returns results with an ID less than (that is, older than) or equal
      *              to the specified ID.

twitter-core/src/main/java/com/twitter/sdk/android/core/services/SearchService.java

@@ -69,7 +69,7 @@ public interface SearchService {
      *              far as the date you specify here.
      * @param sinceId (optional) Returns results with an ID greater than (that is, more recent than)
      *                the specified ID. There are limits to the number of Tweets which can be
-     *                accessed through the API. If the limit of Tweets has occured since the
+     *                accessed through the API. If the limit of Tweets has occurred since the
      *                since_id, the since_id will be forced to the oldest ID available.
      * @param maxId (optional) Returns results with an ID less than (that is, older than) or equal
      *              to the specified ID.