This playbook will show the current time on the server. Wait 3 second and then show the time again.

examples/ansible/sleep.yml

---
- hosts: all
  tasks:
    - name: check date
      command: date
      register: out
    - debug: msg={{out.stdout}}

    - pause: seconds=3

    - name: check date
      command: date
      register: out
    - debug: msg={{out.stdout}}

The output looks like this:

i$ ansible-playbook -i inventory.cfg --limit 192.168.56.11 -b sleep.yml

PLAY [all] ****************************************************************************************************************************

TASK [Gathering Facts] ****************************************************************************************************************
ok: [192.168.56.11]

TASK [check date] *********************************************************************************************************************
changed: [192.168.56.11]

TASK [debug] **************************************************************************************************************************
ok: [192.168.56.11] => {
    "msg": "Sun Mar 18 18:35:59 IST 2018"
}

TASK [pause] **************************************************************************************************************************
Pausing for 3 seconds
(ctrl+C then 'C' = continue early, ctrl+C then 'A' = abort)
ok: [192.168.56.11]

TASK [check date] *********************************************************************************************************************
changed: [192.168.56.11]

TASK [debug] **************************************************************************************************************************
ok: [192.168.56.11] => {
    "msg": "Sun Mar 18 18:36:02 IST 2018"
}

PLAY RECAP ****************************************************************************************************************************
192.168.56.11              : ok=6    changed=2    unreachable=0    failed=0

Read more about pause.