I've been using the solution for one year.

I have been using this solution for three to four months now. 

I've been working on ServiceNow Security Operations for seven months now.

I have been working with ServiceNow Security for 10 years.

I've been using this solution for two years.

I have been working with ServiceNow Security Operations for almost a year.

We have been using ServiceNow Security Operations for six to seven months.

I used the solution for a while. I used it 12 months ago.

I've used the solution for the past year.

I've been using the solution for two years.

I have been implementing ServiceNow for four years.