We're dividing 18573000 by 891 
The aim is to understand the frequency of 891 in 18573000.

Let's proceed to step 1:
891 goes into 1 0 times with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Append the next digit (8) from the dividend to 1 and continue with: 18 / 891

Advancing to step 2:
891 can be fit into 18 0 times, resulting in a remainder of 18.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 18, we get 18.
Include the next digit (5) from the dividend after 18, then repeat: 185 / 891

Advancing to step 3:
If we divide 185 by 891, we get 0 and a remainder of 185.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 185 and we're left with 185.
Grab the next digit (7) from the dividend, add it to 185, then carry on: 1857 / 891

Advancing to step 4:
1857 divided by 891 is 2 with a remainder of 75.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtract 1782 from 1857 to get 75.
Fetch the next digit (3) from the dividend, attach it to 75 and continue: 753 / 891

Advancing to step 5:
753 divided by 891 is 0 with a remainder of 753.
Write down 0 as next digit of the result. 
Result so far: 20.0
Deduct 0 from 753 and we're left with 753.
Include the next digit (0) from the dividend after 753, then repeat: 7530 / 891

Moving on to step 6:
891 can be fit into 7530 8 times, resulting in a remainder of 402.
Put 8 as the next digit of the answer. 
Result so far: 208.0
Subtract 7128 from 7530 to get 402.
Bring next digit (0) of the dividend behind the 402 and repeat the process: 4020 / 891

Moving on to step 7:
When dividing 4020 by 891, we get 4 with a remainder of 456.
Write down 4 as next digit of the result. 
Result so far: 2084.0
Subtract 3564 from 4020 to get 456.
Take the next digit (0) from the dividend and append it to 456, then repeat: 4560 / 891

Let's proceed to step 8:
891 can be fit into 4560 5 times, resulting in a remainder of 105.
Write down 5 as next digit of the result. 
Result so far: 20845.0
If we take 4455 away from 4560, we end up with 105.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1050, and continue the process.

Advancing to step 9:
891 can be fit into 1050 1 times, resulting in a remainder of 159.
The next digit of our result is 1. 
Result so far: 20845.1
The remainder is 159 after subtracting 891 from 1050.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1590, and continue the process.

Let's proceed to step 10:
891 can be fit into 1590 1 times, resulting in a remainder of 699.
Put 1 as the next digit of the answer. 
Result so far: 20845.11
Deduct 891 from 1590 and we're left with 699.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6990, and continue the process.

The final result is 20845.11 with a remainder of 0.699.