70544354 ÷ 646 
The aim is to understand the frequency of 646 in 70544354.

Step 1:
When dividing 7 by 646, we get 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Include the next digit (0) from the dividend after 7, then repeat: 70 / 646

On to step 2:
If we divide 70 by 646, we get 0 and a remainder of 70.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 70 leaves us with 70.
Take the next digit (5) from the dividend and append it to 70, then repeat: 705 / 646

On to step 3:
646 can be fit into 705 1 times, resulting in a remainder of 59.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 646 from 705, we get 59.
Include the next digit (4) from the dividend after 59, then repeat: 594 / 646

Moving on to step 4:
594 divided by 646 is 0 with a remainder of 594.
Use 0 as the next digit of our solution. 
Result so far: 10.0
Deduct 0 from 594 and we're left with 594.
Take the next digit (4) from the dividend and append it to 594, then repeat: 5944 / 646

Step 5:
646 can be fit into 5944 9 times, resulting in a remainder of 130.
Record the quotient 9 as the next digit in the result. 
Result so far: 109.0
The remainder is 130 after subtracting 5814 from 5944.
Fetch the next digit (3) from the dividend, attach it to 130 and continue: 1303 / 646

Let's proceed to step 6:
The number 646 fits into 1303 2 times, leaving a remainder of 11.
The next digit of our result is 2. 
Result so far: 1092.0
Deduct 1292 from 1303 and we're left with 11.
Include the next digit (5) from the dividend after 11, then repeat: 115 / 646

Let's proceed to step 7:
The number 646 fits into 115 0 times, leaving a remainder of 115.
Record the quotient 0 as the next digit in the result. 
Result so far: 10920.0
Subtracting 0 from 115 leaves us with 115.
Fetch the next digit (4) from the dividend, attach it to 115 and continue: 1154 / 646

Going ahead to step 8:
If we divide 1154 by 646, we get 1 and a remainder of 508.
Write down 1 as next digit of the result. 
Result so far: 109201.0
Deduct 646 from 1154 and we're left with 508.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5080, and continue the process.

Advancing to step 9:
The number 646 fits into 5080 7 times, leaving a remainder of 558.
Write down 7 as next digit of the result. 
Result so far: 109201.7
If we take 4522 away from 5080, we end up with 558.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5580, and continue the process.

Moving on to step 10:
If we divide 5580 by 646, we get 8 and a remainder of 412.
Put 8 as the next digit of the answer. 
Result so far: 109201.78
The remainder is 412 after subtracting 5168 from 5580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4120, and continue the process.

Moving on to step 11:
If we divide 4120 by 646, we get 6 and a remainder of 244.
Record the quotient 6 as the next digit in the result. 
Result so far: 109201.786
Subtracting 3876 from 4120 leaves us with 244.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

Let's proceed to step 12:
646 goes into 2440 3 times with a remainder of 502.
The number 3 becomes the next digit in our result. 
Result so far: 109201.7863
If we subtract 1938 from 2440, we get 502.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5020, and continue the process.

Moving on to step 13:
If we divide 5020 by 646, we get 7 and a remainder of 498.
Use 7 as the next digit of our solution. 
Result so far: 109201.78637
Subtract 4522 from 5020 to get 498.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4980, and continue the process.

Advancing to step 14:
The number 646 fits into 4980 7 times, leaving a remainder of 458.
Use 7 as the next digit of our solution. 
Result so far: 109201.786377
Deduct 4522 from 4980 and we're left with 458.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4580, and continue the process.

The quotient of the division is 109201.786377, and the remainder is 4.58e-05.