45391142 ÷ 687 
The aim is to understand the frequency of 687 in 45391142.

Moving on to step 1:
When dividing 4 by 687, we get 0 with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Grab the next digit (5) from the dividend, add it to 4, then carry on: 45 / 687

Going ahead to step 2:
If we divide 45 by 687, we get 0 and a remainder of 45.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 45, we get 45.
Take the next digit (3) from the dividend and append it to 45, then repeat: 453 / 687

Let's proceed to step 3:
If we divide 453 by 687, we get 0 and a remainder of 453.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 453 after subtracting 0 from 453.
Grab the next digit (9) from the dividend, add it to 453, then carry on: 4539 / 687

Advancing to step 4:
When dividing 4539 by 687, we get 6 with a remainder of 417.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
Subtracting 4122 from 4539 leaves us with 417.
Include the next digit (1) from the dividend after 417, then repeat: 4171 / 687

Moving on to step 5:
687 can be fit into 4171 6 times, resulting in a remainder of 49.
Put 6 as the next digit of the answer. 
Result so far: 66.0
If we subtract 4122 from 4171, we get 49.
Grab the next digit (1) from the dividend, add it to 49, then carry on: 491 / 687

Advancing to step 6:
If we divide 491 by 687, we get 0 and a remainder of 491.
The number 0 becomes the next digit in our result. 
Result so far: 660.0
If we subtract 0 from 491, we get 491.
Grab the next digit (4) from the dividend, add it to 491, then carry on: 4914 / 687

Going ahead to step 7:
687 can be fit into 4914 7 times, resulting in a remainder of 105.
Use 7 as the next digit of our solution. 
Result so far: 6607.0
If we take 4809 away from 4914, we end up with 105.
Fetch the next digit (2) from the dividend, attach it to 105 and continue: 1052 / 687

Going ahead to step 8:
If we divide 1052 by 687, we get 1 and a remainder of 365.
The next digit of our result is 1. 
Result so far: 66071.0
Subtracting 687 from 1052 leaves us with 365.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3650, and continue the process.

Moving on to step 9:
687 can be fit into 3650 5 times, resulting in a remainder of 215.
Use 5 as the next digit of our solution. 
Result so far: 66071.5
Deduct 3435 from 3650 and we're left with 215.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2150, and continue the process.

Advancing to step 10:
2150 divided by 687 is 3 with a remainder of 89.
Put 3 as the next digit of the answer. 
Result so far: 66071.53
If we subtract 2061 from 2150, we get 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Going ahead to step 11:
The number 687 fits into 890 1 times, leaving a remainder of 203.
The number 1 becomes the next digit in our result. 
Result so far: 66071.531
Subtracting 687 from 890 leaves us with 203.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2030, and continue the process.

Moving on to step 12:
When dividing 2030 by 687, we get 2 with a remainder of 656.
Put 2 as the next digit of the answer. 
Result so far: 66071.5312
Subtracting 1374 from 2030 leaves us with 656.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6560, and continue the process.

Moving on to step 13:
If we divide 6560 by 687, we get 9 and a remainder of 377.
Use 9 as the next digit of our solution. 
Result so far: 66071.53129
Subtracting 6183 from 6560 leaves us with 377.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3770, and continue the process.

Advancing to step 14:
The number 687 fits into 3770 5 times, leaving a remainder of 335.
The next digit of our result is 5. 
Result so far: 66071.531295
The remainder is 335 after subtracting 3435 from 3770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3350, and continue the process.

Advancing to step 15:
If we divide 3350 by 687, we get 4 and a remainder of 602.
Record the quotient 4 as the next digit in the result. 
Result so far: 66071.5312954
The remainder is 602 after subtracting 2748 from 3350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6020, and continue the process.

Moving on to step 16:
6020 divided by 687 is 8 with a remainder of 524.
Record the quotient 8 as the next digit in the result. 
Result so far: 66071.53129548
The remainder is 524 after subtracting 5496 from 6020.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5240, and continue the process.

The final result is 66071.53129548 with a remainder of 5.24e-07.