I am writing a super-formal letter (it is a semi-legal text) and I am unsure if there is any sensible difference between writing
"It is a great pleasure to us to..." (26,200,000 hits on Google)
"It is a great pleasure of ours to..." (20,300 hits on Google)
The Google-distribution suggests that the second variant might be either
- Grammatically incorrect; and/or
- Used only in certain dialects; or
- More formal than the first variant, and it is rarely used.
Are both expressions correct? If so, why is the second one less popular?