18971561 ÷ 951 
The aim is to understand the frequency of 951 in 18971561.

Moving on to step 1:
951 can be fit into 1 0 times, resulting in a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Bring next digit (8) of the dividend behind the 1 and repeat the process: 18 / 951

Going ahead to step 2:
If we divide 18 by 951, we get 0 and a remainder of 18.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 18, we get 18.
Append the next digit (9) from the dividend to 18 and continue with: 189 / 951

Going ahead to step 3:
The number 951 fits into 189 0 times, leaving a remainder of 189.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 189, we get 189.
Take the next digit (7) from the dividend and append it to 189, then repeat: 1897 / 951

Going ahead to step 4:
1897 divided by 951 is 1 with a remainder of 946.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 951 from 1897, we get 946.
Grab the next digit (1) from the dividend, add it to 946, then carry on: 9461 / 951

Moving on to step 5:
When dividing 9461 by 951, we get 9 with a remainder of 902.
The number 9 becomes the next digit in our result. 
Result so far: 19.0
If we take 8559 away from 9461, we end up with 902.
Include the next digit (5) from the dividend after 902, then repeat: 9025 / 951

Advancing to step 6:
The number 951 fits into 9025 9 times, leaving a remainder of 466.
Put 9 as the next digit of the answer. 
Result so far: 199.0
Deduct 8559 from 9025 and we're left with 466.
Append the next digit (6) from the dividend to 466 and continue with: 4666 / 951

Advancing to step 7:
951 goes into 4666 4 times with a remainder of 862.
Record the quotient 4 as the next digit in the result. 
Result so far: 1994.0
The remainder is 862 after subtracting 3804 from 4666.
Fetch the next digit (1) from the dividend, attach it to 862 and continue: 8621 / 951

Step 8:
8621 divided by 951 is 9 with a remainder of 62.
Record the quotient 9 as the next digit in the result. 
Result so far: 19949.0
The remainder is 62 after subtracting 8559 from 8621.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Step 9:
951 goes into 620 0 times with a remainder of 620.
The number 0 becomes the next digit in our result. 
Result so far: 19949.0
If we take 0 away from 620, we end up with 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6200, and continue the process.

Advancing to step 10:
If we divide 6200 by 951, we get 6 and a remainder of 494.
The number 6 becomes the next digit in our result. 
Result so far: 19949.06
The remainder is 494 after subtracting 5706 from 6200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4940, and continue the process.

Step 11:
4940 divided by 951 is 5 with a remainder of 185.
The number 5 becomes the next digit in our result. 
Result so far: 19949.065
If we take 4755 away from 4940, we end up with 185.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1850, and continue the process.

Going ahead to step 12:
951 goes into 1850 1 times with a remainder of 899.
The number 1 becomes the next digit in our result. 
Result so far: 19949.0651
If we subtract 951 from 1850, we get 899.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8990, and continue the process.

Moving on to step 13:
If we divide 8990 by 951, we get 9 and a remainder of 431.
Record the quotient 9 as the next digit in the result. 
Result so far: 19949.06519
Subtract 8559 from 8990 to get 431.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4310, and continue the process.

Moving on to step 14:
951 can be fit into 4310 4 times, resulting in a remainder of 506.
Use 4 as the next digit of our solution. 
Result so far: 19949.065194
Subtract 3804 from 4310 to get 506.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5060, and continue the process.

Step 15:
951 goes into 5060 5 times with a remainder of 305.
Use 5 as the next digit of our solution. 
Result so far: 19949.0651945
Subtract 4755 from 5060 to get 305.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3050, and continue the process.

On to step 16:
951 can be fit into 3050 3 times, resulting in a remainder of 197.
Record the quotient 3 as the next digit in the result. 
Result so far: 19949.06519453
Deduct 2853 from 3050 and we're left with 197.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1970, and continue the process.

The quotient of the division is 19949.06519453, and the remainder is 1.97e-07.