We look at the division of 74481902 by 897 
The aim is to understand the frequency of 897 in 74481902.

On to step 1:
7 divided by 897 is 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Fetch the next digit (4) from the dividend, attach it to 7 and continue: 74 / 897

Step 2:
74 divided by 897 is 0 with a remainder of 74.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 74 to get 74.
Take the next digit (4) from the dividend and append it to 74, then repeat: 744 / 897

Going ahead to step 3:
When dividing 744 by 897, we get 0 with a remainder of 744.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 744, we end up with 744.
Bring next digit (8) of the dividend behind the 744 and repeat the process: 7448 / 897

Going ahead to step 4:
When dividing 7448 by 897, we get 8 with a remainder of 272.
The next digit of our result is 8. 
Result so far: 8.0
If we subtract 7176 from 7448, we get 272.
Append the next digit (1) from the dividend to 272 and continue with: 2721 / 897

Moving on to step 5:
897 goes into 2721 3 times with a remainder of 30.
Put 3 as the next digit of the answer. 
Result so far: 83.0
Subtracting 2691 from 2721 leaves us with 30.
Bring next digit (9) of the dividend behind the 30 and repeat the process: 309 / 897

Moving on to step 6:
897 goes into 309 0 times with a remainder of 309.
The number 0 becomes the next digit in our result. 
Result so far: 830.0
If we take 0 away from 309, we end up with 309.
Take the next digit (0) from the dividend and append it to 309, then repeat: 3090 / 897

On to step 7:
3090 divided by 897 is 3 with a remainder of 399.
The next digit of our result is 3. 
Result so far: 8303.0
Deduct 2691 from 3090 and we're left with 399.
Fetch the next digit (2) from the dividend, attach it to 399 and continue: 3992 / 897

On to step 8:
3992 divided by 897 is 4 with a remainder of 404.
Use 4 as the next digit of our solution. 
Result so far: 83034.0
Subtract 3588 from 3992 to get 404.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4040, and continue the process.

On to step 9:
If we divide 4040 by 897, we get 4 and a remainder of 452.
Write down 4 as next digit of the result. 
Result so far: 83034.4
If we take 3588 away from 4040, we end up with 452.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4520, and continue the process.

Advancing to step 10:
897 can be fit into 4520 5 times, resulting in a remainder of 35.
Put 5 as the next digit of the answer. 
Result so far: 83034.45
The remainder is 35 after subtracting 4485 from 4520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

On to step 11:
When dividing 350 by 897, we get 0 with a remainder of 350.
Record the quotient 0 as the next digit in the result. 
Result so far: 83034.45
The remainder is 350 after subtracting 0 from 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

On to step 12:
897 goes into 3500 3 times with a remainder of 809.
The next digit of our result is 3. 
Result so far: 83034.4503
Subtract 2691 from 3500 to get 809.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8090, and continue the process.

Going ahead to step 13:
897 goes into 8090 9 times with a remainder of 17.
Put 9 as the next digit of the answer. 
Result so far: 83034.45039
Deduct 8073 from 8090 and we're left with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Advancing to step 14:
If we divide 170 by 897, we get 0 and a remainder of 170.
Record the quotient 0 as the next digit in the result. 
Result so far: 83034.45039
Deduct 0 from 170 and we're left with 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Let's proceed to step 15:
897 can be fit into 1700 1 times, resulting in a remainder of 803.
Put 1 as the next digit of the answer. 
Result so far: 83034.4503901
Deduct 897 from 1700 and we're left with 803.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8030, and continue the process.

Going ahead to step 16:
897 can be fit into 8030 8 times, resulting in a remainder of 854.
Record the quotient 8 as the next digit in the result. 
Result so far: 83034.45039018
If we subtract 7176 from 8030, we get 854.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8540, and continue the process.

After the division, we end up with 83034.45039018 and a remainder of 8.54e-07.