63066943 divided by 401 
The aim is to understand the frequency of 401 in 63066943.

On to step 1:
401 can be fit into 6 0 times, resulting in a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Append the next digit (3) from the dividend to 6 and continue with: 63 / 401

Let's proceed to step 2:
401 can be fit into 63 0 times, resulting in a remainder of 63.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 63 to get 63.
Bring next digit (0) of the dividend behind the 63 and repeat the process: 630 / 401

Advancing to step 3:
630 divided by 401 is 1 with a remainder of 229.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 229 after subtracting 401 from 630.
Bring next digit (6) of the dividend behind the 229 and repeat the process: 2296 / 401

Moving on to step 4:
When dividing 2296 by 401, we get 5 with a remainder of 291.
Record the quotient 5 as the next digit in the result. 
Result so far: 15.0
Subtract 2005 from 2296 to get 291.
Grab the next digit (6) from the dividend, add it to 291, then carry on: 2916 / 401

On to step 5:
The number 401 fits into 2916 7 times, leaving a remainder of 109.
Write down 7 as next digit of the result. 
Result so far: 157.0
Deduct 2807 from 2916 and we're left with 109.
Include the next digit (9) from the dividend after 109, then repeat: 1099 / 401

Going ahead to step 6:
401 goes into 1099 2 times with a remainder of 297.
Write down 2 as next digit of the result. 
Result so far: 1572.0
Subtract 802 from 1099 to get 297.
Include the next digit (4) from the dividend after 297, then repeat: 2974 / 401

Step 7:
If we divide 2974 by 401, we get 7 and a remainder of 167.
The number 7 becomes the next digit in our result. 
Result so far: 15727.0
Subtracting 2807 from 2974 leaves us with 167.
Grab the next digit (3) from the dividend, add it to 167, then carry on: 1673 / 401

Let's proceed to step 8:
When dividing 1673 by 401, we get 4 with a remainder of 69.
Record the quotient 4 as the next digit in the result. 
Result so far: 157274.0
The remainder is 69 after subtracting 1604 from 1673.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Let's proceed to step 9:
The number 401 fits into 690 1 times, leaving a remainder of 289.
Write down 1 as next digit of the result. 
Result so far: 157274.1
If we take 401 away from 690, we end up with 289.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2890, and continue the process.

Going ahead to step 10:
The number 401 fits into 2890 7 times, leaving a remainder of 83.
Put 7 as the next digit of the answer. 
Result so far: 157274.17
The remainder is 83 after subtracting 2807 from 2890.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

On to step 11:
401 goes into 830 2 times with a remainder of 28.
The next digit of our result is 2. 
Result so far: 157274.172
Deduct 802 from 830 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Going ahead to step 12:
When dividing 280 by 401, we get 0 with a remainder of 280.
Put 0 as the next digit of the answer. 
Result so far: 157274.172
The remainder is 280 after subtracting 0 from 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Advancing to step 13:
When dividing 2800 by 401, we get 6 with a remainder of 394.
Use 6 as the next digit of our solution. 
Result so far: 157274.17206
Subtracting 2406 from 2800 leaves us with 394.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3940, and continue the process.

Let's proceed to step 14:
The number 401 fits into 3940 9 times, leaving a remainder of 331.
Use 9 as the next digit of our solution. 
Result so far: 157274.172069
Subtracting 3609 from 3940 leaves us 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.

Going ahead to step 15:
The number 401 fits into 3310 8 times, leaving a remainder of 102.
The number 8 becomes the next digit in our result. 
Result so far: 157274.1720698
Subtract 3208 from 3310 to get 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

On to step 16:
When dividing 1020 by 401, we get 2 with a remainder of 218.
Record the quotient 2 as the next digit in the result. 
Result so far: 157274.17206982
The remainder is 218 after subtracting 802 from 1020.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2180, and continue the process.

After the division, we end up with 157274.17206982 and a remainder of 2.18e-07.