Add an auto-refresh on an IFRAME

I need assistance with the below code. I need to add something in so that it auto-refreshes on a regular basis. What do I need to add?

<iframe 
   src="https://docs.google.com/spreadsheets/d/e/2PACX-1vRhl6HlSXkbrMcFZBSH58Jx5_VwFqzfFr0aqWcKXs4nWVfPDjwwh4vv6pLRur0nR0SKjRShN8/pubhtml?gid=1977651099&amp;single=true&amp;widget=true&amp;headers=false"
   height=800 
   width=800>
</iframe>

I am a beginner and have no experience in coding

8 thoughts on “Add an auto-refresh on an IFRAME”

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