thousand and thousands

[hey-ho]

Hi,

In the following sentence:

"We'll be invaded by thousand and thousands of flies this summer"

Is "thousand" written OK? (no S for the first one and an S for the second one??) or is there an "S" at each thousand??

Thanks!

 

[JamesM]

In this particular context both "thousands" should have an "s", just as in "hundreds and hundreds", "dozens and dozens", "millions and millions", etc.

 

[hey-ho]

Thank you for your help!