diff --git a/5-network/10-long-polling/article.md b/5-network/10-long-polling/article.md
index 68eec844..b252fa9a 100644
--- a/5-network/10-long-polling/article.md
+++ b/5-network/10-long-polling/article.md
@@ -6,7 +6,7 @@ Being very easy to implement, it's also good enough in a lot of cases.
 
 ## Regular Polling
 
-The simplest way to get new information from the server is periodic polling. That is, regular requests to the server: "Hello, I'm here, do you have any information for me?". For example, once in 10 seconds.
+The simplest way to get new information from the server is periodic polling. That is, regular requests to the server: "Hello, I'm here, do you have any information for me?". For example, once every 10 seconds.
 
 In response, the server first takes a notice to itself that the client is online, and second - sends a packet of messages it got till that moment.