42351451 ÷ 336 
The aim is to understand the frequency of 336 in 42351451.

Advancing to step 1:
336 goes into 4 0 times with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Grab the next digit (2) from the dividend, add it to 4, then carry on: 42 / 336

Advancing to step 2:
42 divided by 336 is 0 with a remainder of 42.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 42 to get 42.
Include the next digit (3) from the dividend after 42, then repeat: 423 / 336

Moving on to step 3:
If we divide 423 by 336, we get 1 and a remainder of 87.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 336 from 423 and we're left with 87.
Fetch the next digit (5) from the dividend, attach it to 87 and continue: 875 / 336

Let's proceed to step 4:
336 can be fit into 875 2 times, resulting in a remainder of 203.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
Deduct 672 from 875 and we're left with 203.
Grab the next digit (1) from the dividend, add it to 203, then carry on: 2031 / 336

Step 5:
When dividing 2031 by 336, we get 6 with a remainder of 15.
Put 6 as the next digit of the answer. 
Result so far: 126.0
Subtracting 2016 from 2031 leaves us with 15.
Grab the next digit (4) from the dividend, add it to 15, then carry on: 154 / 336

On to step 6:
When dividing 154 by 336, we get 0 with a remainder of 154.
The next digit of our result is 0. 
Result so far: 1260.0
Deduct 0 from 154 and we're left with 154.
Grab the next digit (5) from the dividend, add it to 154, then carry on: 1545 / 336

Moving on to step 7:
1545 divided by 336 is 4 with a remainder of 201.
The number 4 becomes the next digit in our result. 
Result so far: 12604.0
Subtract 1344 from 1545 to get 201.
Include the next digit (1) from the dividend after 201, then repeat: 2011 / 336

Let's proceed to step 8:
When dividing 2011 by 336, we get 5 with a remainder of 331.
The number 5 becomes the next digit in our result. 
Result so far: 126045.0
Deduct 1680 from 2011 and we're left with 331.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3310, and continue the process.

Moving on to step 9:
When dividing 3310 by 336, we get 9 with a remainder of 286.
The number 9 becomes the next digit in our result. 
Result so far: 126045.9
Subtract 3024 from 3310 to get 286.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2860, and continue the process.

Step 10:
336 can be fit into 2860 8 times, resulting in a remainder of 172.
Use 8 as the next digit of our solution. 
Result so far: 126045.98
If we take 2688 away from 2860, we end up with 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

Advancing to step 11:
336 can be fit into 1720 5 times, resulting in a remainder of 40.
The number 5 becomes the next digit in our result. 
Result so far: 126045.985
If we take 1680 away from 1720, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 12:
If we divide 400 by 336, we get 1 and a remainder of 64.
The next digit of our result is 1. 
Result so far: 126045.9851
Deduct 336 from 400 and we're left with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Step 13:
336 can be fit into 640 1 times, resulting in a remainder of 304.
Use 1 as the next digit of our solution. 
Result so far: 126045.98511
Subtract 336 from 640 to get 304.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3040, and continue the process.

The quotient of the division is 126045.98511, and the remainder is 0.000304.