We look at the division of 2151591 by 971 
The aim is to understand the frequency of 971 in 2151591.

Going ahead to step 1:
971 can be fit into 2 0 times, resulting in a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 971

Advancing to step 2:
21 divided by 971 is 0 with a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Bring next digit (5) of the dividend behind the 21 and repeat the process: 215 / 971

Moving on to step 3:
971 goes into 215 0 times with a remainder of 215.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 215, we end up with 215.
Bring next digit (1) of the dividend behind the 215 and repeat the process: 2151 / 971

Let's proceed to step 4:
When dividing 2151 by 971, we get 2 with a remainder of 209.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we subtract 1942 from 2151, we get 209.
Take the next digit (5) from the dividend and append it to 209, then repeat: 2095 / 971

Let's proceed to step 5:
When dividing 2095 by 971, we get 2 with a remainder of 153.
Record the quotient 2 as the next digit in the result. 
Result so far: 22.0
The remainder is 153 after subtracting 1942 from 2095.
Grab the next digit (9) from the dividend, add it to 153, then carry on: 1539 / 971

Let's proceed to step 6:
When dividing 1539 by 971, we get 1 with a remainder of 568.
Use 1 as the next digit of our solution. 
Result so far: 221.0
If we subtract 971 from 1539, we get 568.
Take the next digit (1) from the dividend and append it to 568, then repeat: 5681 / 971

Step 7:
971 goes into 5681 5 times with a remainder of 826.
The number 5 becomes the next digit in our result. 
Result so far: 2215.0
If we take 4855 away from 5681, we end up with 826.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8260, and continue the process.

Advancing to step 8:
When dividing 8260 by 971, we get 8 with a remainder of 492.
Put 8 as the next digit of the answer. 
Result so far: 2215.8
The remainder is 492 after subtracting 7768 from 8260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4920, and continue the process.

Going ahead to step 9:
The number 971 fits into 4920 5 times, leaving a remainder of 65.
Write down 5 as next digit of the result. 
Result so far: 2215.85
If we subtract 4855 from 4920, we get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

On to step 10:
650 divided by 971 is 0 with a remainder of 650.
Write down 0 as next digit of the result. 
Result so far: 2215.85
If we subtract 0 from 650, we get 650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6500, and continue the process.

Advancing to step 11:
971 can be fit into 6500 6 times, resulting in a remainder of 674.
The next digit of our result is 6. 
Result so far: 2215.8506
Subtract 5826 from 6500 to get 674.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6740, and continue the process.

Going ahead to step 12:
6740 divided by 971 is 6 with a remainder of 914.
Put 6 as the next digit of the answer. 
Result so far: 2215.85066
Deduct 5826 from 6740 and we're left with 914.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9140, and continue the process.

The quotient of the division is 2215.85066, and the remainder is 0.000914.