Looking on the internet deeply has found these results:

I have only a few Christmas cards left to write. is the most popular phrase on the web.

I have only a less Christmas cards left to write. 11 results on the web	I have only a few Christmas cards left to write. 1114 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
There is still time left to write. You mean just one less Christmas card to me. I have a mission statement to write. One less Christmas card I'll have to send this year. Ingrid, I have a speech to write. I have a letter to write. You lucky, if Nathan hadn't stopped the fight, I'd have one less Christmas card to send. There are only a few more chapters to write.	There is still time left to write. Mr President, I have only a few very brief remarks. But I have only a few days furlough! Mr President, since I have only two minutes to react, I would like to address only a few things. Madam President, I have only a few brief comments to make on a report whose conclusions I largely support. There are only a few more chapters to write. I have only a few comments to make on this. I have only a few minutes to finish.

I have only a less Christmas cards left to write.

11 results on the web

I have only a few Christmas cards left to write.

1114 results on the web

More popular!

There is still time left to write.
You mean just one less Christmas card to me.
I have a mission statement to write.
One less Christmas card I'll have to send this year.
Ingrid, I have a speech to write.
I have a letter to write.
You lucky, if Nathan hadn't stopped the fight, I'd have one less Christmas card to send.
There are only a few more chapters to write.

There is still time left to write.
Mr President, I have only a few very brief remarks.
But I have only a few days furlough!
Mr President, since I have only two minutes to react, I would like to address only a few things.
Madam President, I have only a few brief comments to make on a report whose conclusions I largely support.
There are only a few more chapters to write.
I have only a few comments to make on this.
I have only a few minutes to finish.