53424574 ÷ 665 
The aim is to understand the frequency of 665 in 53424574.

Going ahead to step 1:
665 goes into 5 0 times with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Fetch the next digit (3) from the dividend, attach it to 5 and continue: 53 / 665

Let's proceed to step 2:
The number 665 fits into 53 0 times, leaving a remainder of 53.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 53 to get 53.
Grab the next digit (4) from the dividend, add it to 53, then carry on: 534 / 665

Moving on to step 3:
665 can be fit into 534 0 times, resulting in a remainder of 534.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 534 to get 534.
Include the next digit (2) from the dividend after 534, then repeat: 5342 / 665

Step 4:
665 goes into 5342 8 times with a remainder of 22.
Put 8 as the next digit of the answer. 
Result so far: 8.0
The remainder is 22 after subtracting 5320 from 5342.
Grab the next digit (4) from the dividend, add it to 22, then carry on: 224 / 665

Step 5:
665 goes into 224 0 times with a remainder of 224.
The number 0 becomes the next digit in our result. 
Result so far: 80.0
If we subtract 0 from 224, we get 224.
Append the next digit (5) from the dividend to 224 and continue with: 2245 / 665

Going ahead to step 6:
665 goes into 2245 3 times with a remainder of 250.
Put 3 as the next digit of the answer. 
Result so far: 803.0
The remainder is 250 after subtracting 1995 from 2245.
Include the next digit (7) from the dividend after 250, then repeat: 2507 / 665

Step 7:
If we divide 2507 by 665, we get 3 and a remainder of 512.
The number 3 becomes the next digit in our result. 
Result so far: 8033.0
Subtracting 1995 from 2507 leaves us with 512.
Grab the next digit (4) from the dividend, add it to 512, then carry on: 5124 / 665

Moving on to step 8:
5124 divided by 665 is 7 with a remainder of 469.
Use 7 as the next digit of our solution. 
Result so far: 80337.0
If we subtract 4655 from 5124, we get 469.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4690, and continue the process.

Moving on to step 9:
If we divide 4690 by 665, we get 7 and a remainder of 35.
Put 7 as the next digit of the answer. 
Result so far: 80337.7
If we take 4655 away from 4690, we end up with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Going ahead to step 10:
The number 665 fits into 350 0 times, leaving a remainder of 350.
Use 0 as the next digit of our solution. 
Result so far: 80337.7
If we take 0 away from 350, we end up with 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

Step 11:
When dividing 3500 by 665, we get 5 with a remainder of 175.
Write down 5 as next digit of the result. 
Result so far: 80337.705
Subtract 3325 from 3500 to get 175.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1750, and continue the process.

Let's proceed to step 12:
The number 665 fits into 1750 2 times, leaving a remainder of 420.
Write down 2 as next digit of the result. 
Result so far: 80337.7052
Subtract 1330 from 1750 to get 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4200, and continue the process.

Advancing to step 13:
If we divide 4200 by 665, we get 6 and a remainder of 210.
Put 6 as the next digit of the answer. 
Result so far: 80337.70526
If we take 3990 away from 4200, we end up with 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Moving on to step 14:
2100 divided by 665 is 3 with a remainder of 105.
Record the quotient 3 as the next digit in the result. 
Result so far: 80337.705263
Deduct 1995 from 2100 and we're left 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 15:
The number 665 fits into 1050 1 times, leaving a remainder of 385.
Use 1 as the next digit of our solution. 
Result so far: 80337.7052631
Subtract 665 from 1050 to get 385.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3850, and continue the process.

Going ahead to step 16:
The number 665 fits into 3850 5 times, leaving a remainder of 525.
Record the quotient 5 as the next digit in the result. 
Result so far: 80337.70526315
Subtracting 3325 from 3850 leaves us with 525.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5250, and continue the process.

After the division, we end up with 80337.70526315 and a remainder of 5.25e-07.