We look at the division of 37386547 by 401 
The aim is to understand the frequency of 401 in 37386547.

Going ahead to step 1:
If we divide 3 by 401, we get 0 and a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Bring next digit (7) of the dividend behind the 3 and repeat the process: 37 / 401

Step 2:
If we divide 37 by 401, we get 0 and a remainder of 37.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 37, we get 37.
Append the next digit (3) from the dividend to 37 and continue with: 373 / 401

On to step 3:
The number 401 fits into 373 0 times, leaving a remainder of 373.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 373, we get 373.
Grab the next digit (8) from the dividend, add it to 373, then carry on: 3738 / 401

Going ahead to step 4:
401 goes into 3738 9 times with a remainder of 129.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
The remainder is 129 after subtracting 3609 from 3738.
Take the next digit (6) from the dividend and append it to 129, then repeat: 1296 / 401

Let's proceed to step 5:
The number 401 fits into 1296 3 times, leaving a remainder of 93.
Use 3 as the next digit of our solution. 
Result so far: 93.0
If we subtract 1203 from 1296, we get 93.
Bring next digit (5) of the dividend behind the 93 and repeat the process: 935 / 401

Moving on to step 6:
401 goes into 935 2 times with a remainder of 133.
The next digit of our result is 2. 
Result so far: 932.0
If we subtract 802 from 935, we get 133.
Grab the next digit (4) from the dividend, add it to 133, then carry on: 1334 / 401

Moving on to step 7:
1334 divided by 401 is 3 with a remainder of 131.
Put 3 as the next digit of the answer. 
Result so far: 9323.0
Subtracting 1203 from 1334 leaves us with 131.
Grab the next digit (7) from the dividend, add it to 131, then carry on: 1317 / 401

Let's proceed to step 8:
If we divide 1317 by 401, we get 3 and a remainder of 114.
The number 3 becomes the next digit in our result. 
Result so far: 93233.0
If we subtract 1203 from 1317, we get 114.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1140, and continue the process.

On to step 9:
401 goes into 1140 2 times with a remainder of 338.
Put 2 as the next digit of the answer. 
Result so far: 93233.2
If we subtract 802 from 1140, we get 338.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3380, and continue the process.

On to step 10:
401 goes into 3380 8 times with a remainder of 172.
Record the quotient 8 as the next digit in the result. 
Result so far: 93233.28
Deduct 3208 from 3380 and we're left 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:
If we divide 1720 by 401, we get 4 and a remainder of 116.
Put 4 as the next digit of the answer. 
Result so far: 93233.284
If we take 1604 away from 1720, we end up with 116.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

Going ahead to step 12:
When dividing 1160 by 401, we get 2 with a remainder of 358.
Record the quotient 2 as the next digit in the result. 
Result so far: 93233.2842
If we take 802 away from 1160, we end up with 358.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3580, and continue the process.

On to step 13:
If we divide 3580 by 401, we get 8 and a remainder of 372.
Put 8 as the next digit of the answer. 
Result so far: 93233.28428
Subtract 3208 from 3580 to get 372.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3720, and continue the process.

On to step 14:
If we divide 3720 by 401, we get 9 and a remainder of 111.
The next digit of our result is 9. 
Result so far: 93233.284289
Deduct 3609 from 3720 and we're left with 111.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1110, and continue the process.

Going ahead to step 15:
The number 401 fits into 1110 2 times, leaving a remainder of 308.
Put 2 as the next digit of the answer. 
Result so far: 93233.2842892
If we subtract 802 from 1110, we get 308.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3080, and continue the process.

Let's proceed to step 16:
401 goes into 3080 7 times with a remainder of 273.
Use 7 as the next digit of our solution. 
Result so far: 93233.28428927
If we subtract 2807 from 3080, we get 273.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2730, and continue the process.

The final outcome is 93233.28428927, with a leftover of 2.73e-07.