Historical clue formulations

• In an online convo, perhaps — 2024-11-27
• Sending a Slack message, say — 2021-11-16
• Online back-and-forth, informally — 2019-11-15
• Chatting online, in brief — 2019-07-08
• Chatting online with, for short — 2016-03-20
• Cyberchatting — 2007-04-01